Apr 19, 2006. You're right. PonyXpress said: 90 bronco no power to pump. Fuel pump relay wiring diagram. By http://www.channel4.com/programmes/the-plane-crash, Boeing 737, deliberately crashed into a Mexican desert, for 'scientific purposes' (I'll believe them). Having researched the Forum, I propose using the PBT-GF15 type switch used by other owners. Start / Nissan / Safari / Ask an expert. */. Second suggestion is to use a relay. Employ automotive wire that is sturdy enough to withstand the voltage. 1.3M views 10 years ago Ford Electric Fuel Pump Only (in-tank) This video is about check the inertia switch on Ford vehicle fuel systems. . You must log in or register to reply here. Display as a link instead, In that case, installing an inertia switch between the oil pressure switch and the fuel pump would be very easy! . Manage Settings Using the wiring diagram above, trim and splice your fuel pump components. Personally - I like the sound of both intertia switch and engine running sensors. relay & fuse under hood not blown.. Posted by Angie Chesser on Dec 12, 2013 Open Questions: 0 answers 2008 1.25 Zetec. If you leave the kill switch in an easily accessible location, your installation will be useless. 12v goes to Common. i have tested power through the fuse box, checked all relays and fuses, all good. It could even be hidden in another, stock switch to be hidden in plain sight. . Sponsored. 1991 Jeep Wrangler . Select the live feed from the battery/ignition to the fuel pump. I would never not use the inertia switch in a fuel injected car. This helps support this channel and allows me to continue to make videos like this. Remember that you must have your ignition switched on for this to function. . Troubleshooting w/Wiring Diagram in 94-95 F Series; Miesk5 note that this is for F Series w/dual tanks & pumps; the R/Y wire from Inertia Switch to Fuel Pump is PK/BK on Broncos Source: by seijirou at Disconnect battery and check for continuity on LB/O wire from FP relay to PCM pin #22 EEC IV Connector Pin Diagram The experts said that it might go on until the tanks were empty, so they sprayed fire hoses into the air intakes to stop them. wiring pump fuel diagram switch pressure relay well electric oil volvo safety wire penta airtex ignition electrical holley square automotive. So, I assume the switch will handle the current. Buy Fuel Cut-off Car Switch Assemblies and get the best deals at the lowest prices on eBay! JAVASCRIPT IS DISABLED. You should check the voltage using your digital multimeter. Ask questions in the forums, fix common issues using our helpful guides, upload your photos to the gallery or buy and sell with the online classifieds. The switch mounts to a vertical surface in the engine bay and in the unfortunate event of a crash cuts the power to the fuel pump preventing fuel spillage. Why not get a 2nd FIAT switch and loom section. I imagine that it is in series with the connection from the fuse box to the solenoid of the cut-out relay (or from the solenoid of the cut-out relay to the oil pressure switch). Some of our partners may process your data as a part of their legitimate business interest without asking for consent. No power to Fuel pump inertia switch Test light comes on touched to grey w/orange stripe wire (ground?) Part #645-920. An electrical fire might arise from using a thinner wire that cannot securely transmit voltage. 8,943. HONDA CIVIC MK8 MK9 PETROL FUEL CUT OFF BUTTON SWITCH CONTROL UNIT 35910S04G010. spray started fluid and got it to fire up, to rule out a spark issue. In accordance with your application, you may need to dismantle your back seats or reach your fuel pump through your trunk. It has spark, but. killing the fuel pump. When the engine starts, the EEC receives a tach signal from the distributor, keeping the fuel pump relay closed and the fuel pump running. The control path consists of the inertia switch, the computer, and the fuel pump relay coil. The usual recommendation if you are running Lucas Pi is to use a relay next to the fuel pump, as that takes a lot of amps (10-14?). I'd just put your inertia switch in that lead from ignition switch to pump. New . 6. 1992 Ford F150 FUEL INERTIA PUMP: 1992 Ford F150 V8 Two Wheel www.2carpros.com. The included harness connects "NO" and "NC", so I won't be using that wiring. 1. Contains connector body and electrical contacts to enable the wiring loom to be connected to the switch. Which is in? The consent submitted will only be used for data processing originating from this website. I use a 4 pin relay, two inline fuses, a single pole single throw switch, and an external fuel pump for the demonstration. This is my video on how to choose the right fuse and wire sizes when building a circuit: https://www.youtube.com/watch?v=EhzN6UdnmPA Automotive Wiring How-To's: https://www.youtube.com/playlist?list=PLsF7T1tRFy2hmiiUUfMZNyV-BUA_yrPIhTime Stamps:00:00 How to wire an inertia switch00:34 The components in an inertia switch circuit01:24 How to wire the switch01:45 Pin 86 on the relay (switch power)01:57 What is the purpose of a relay?02:40 Pin 85 on the relay (switch ground)03:20 Pin 30 on the relay (fuel pump 12v input)03:32 Pin 87 on the relay (fuel pump 12v output)04:09 How to re-pin the inertia switch to be Normally Closed (NC)05:48 How does an inertia switch work?07:49 The inertia switch wiring reviewItems used in this inertia switch circuit: 4-Pin Relays (2-pack) https://amzn.to/3NNeGA3 Inertia Switch https://amzn.to/3hfW3si Single pole single throw switches (8-pack) https://amzn.to/3DGaDko 12 Spot Universal Fuse Box - https://amzn.to/3skpKur Universal fuse holders https://amzn.to/3eVf2HN*As an Amazon associate I earn from qualifying purchases. Subscribe to This YouTube Channel: https://www.rattymusclecar.com/Subscribe Follow me on Instagram: @Ratty_Muscle_Car https://www.rattymusclecar.com/Instagram Join me on Facebook: https://www.rattymusclecar.com/FacebookTags:#RattyMuscleCar#wiring#AutomotivewiringPlease Note: This video description contains affiliate links, which means that if you click on one of the product links above, I will receive a small commission. I am just a random guy on the internet, not an expert or professional. We checked for power at pump and inertia Ask an Expert Car Questions Ford Repair Jaybird61, ASE Certified Master. Gas vapors or fumes can create a hazardous working environment. If you have an account, sign in now to post with your account. Donald . For a better experience, please enable JavaScript in your browser before proceeding. This one of the moments that it's a shame that a 2/3/3A doesn't have an oil pressure switch. Fuel Pump Inertia Switch Submitted by Craig Evers One of the least appreciated components in your fuel injection system is the fuel pump inertia switch. High power in (30), then out to pump (87). Fuel Pump Cut-Off Switch Connector-Inertia Fuel Shutoff Switch Connector Dorman. hi all i am only just getting round to wiring in an inertia fuel pump cut off, my fuel system has two fuel pumps a low pressure feeding the swirl pot and then a high pressure after. When the jumper wire is connected to the coil there with ignition switch on there is power to both ignition and EEC of the fuel pump relay. enough to access the fuel pump and I found a 5 wire connector going to the. https://www.te.com/usa-en/plp/automotive-terminals/Y30g2.html, Alarm Wiring Help - Neg + Pos Door Switch Problems. F150 1986 ford fuel diagram wiring bronco wire computer system pump start pickup circuit truck where pressure check justanswer wires. It's not just a switch, it's got 3 wires connecting to it! Dust, electrical power surge, and other factors can cause a fuel pump relay to go bad. Engine stops, no oil pressure, no petrol. The fuel pump electric supply goes through the oil pressure switch, just like Donald's Suburban. . Press down the rubber reset button on the top of the inertia switch. Clear editor. BUICK > 1998 > RIVIERA > 3.8L V6 Supercharged > Electrical-Switch & Relay > Fuel Pump Cutoff Switch. F350 Ac Diagram - Wiring Images 19.ksjo.pl. You might connect your fuel pump kill switch using a common single post automotive relay by following the circuit diagram for the fuel pump kill switch shown below. Thanks guys, all I've read about canbus is that you cannot modify the wiring in length or with soldered joints. The gasoline pump kill switch can then be hidden or stashed so that a thief cannot find it. Tip: I highly recommend hiding the kill switch so that auto thieves wont be able to steal your fuel pump. This is why you may get extended cranking on initial startup because the fuel pump relay is not working but the closing of the oil pressure switch ( once oil pressure is reached during cranking) will allow fuel pump operation. Location. Received 145 Likes on 113 Posts Micro switch As far as the in cab switch goes, this is your antitheft device. It is not recommended you install a kill switch and have it sitting alone. Have a 1986 f150 would not start. Fuel pump wiring diagram 401. no fuel, even at the input of the filter. Never access the fuel pump component when installing a gasoline pump kill switch. 8 Pics about 2015 Nissan Frontier Fuel Filter Location - Wiring Diagram Schemas : Were Is The Fuel Pump Relay Located On A Ford Explorer - cptcode.se, [DIAGRAM] 2002 Ford Explorer 4 0 Fuel System Diagram FULL Version HD and also 2000 Ford Ranger Inertia Switch Pictures to Pin on Pinterest - PinsDaddy. the problem is the HP pump is controlled by the megasquirt and the the low is on as soon as the ignition is turned on so this way i would need to put the inertia switch on the main . The inertia switch should be fitted on the low power line in to the relay switch (86) with the earth coming off 85. That I understand and is simple for me. MilesA, Please Tell Us How We Can Improve This Article. If the wiring and switch do not add any significant resistance, the Canbus will not know it is there. 2005 F-250 CC/SB 4X4, 6.0L PSD-Torqueshift . So all you have to do is jumper the wires (paper clip) then turn your key and listen for the fuel pump to prime (comes on for 1 second when the key is turned to teh on position) Didn't find an answer on the Fuel pump wiring diagram of the Volvo V40 Cross Country? Make sure the on and off positions are correctly oriented, such as up is on and down is off. This switch is supplied with a complete fitting kit. Many three-prong toggle switches lack the necessary amp capacity, leading to electrical issues. A. 4,374 Satisfied Customers Automotive Instructor at Palm Beach State College Jaybird61 is online now Related Ford Questions Intermediate stalls. It may not display this or other websites correctly. Location: Cambs. inertia sebring fixya shutoff locate. This I also understand but, I am not sure where the power supply into the inertia switch should come from. JavaScript is disabled. Your previous content has been restored. The nose was torn off, the landing gear came up through the wings, the interior looked . like a plane crash. Fuel switch selector diesel ford pump 1993 series . Loosen the filler cap from the fuel tank and place your ear near the nozzle. Good thing -- because that's the way its wired on my car, I was hoping to avoid redoing it. Ian Cornish Quote john.r.davies TR Register Members 9,250 posts Location:Lancaster UK One task at a time please - I am still learning! So which of the two methods is preferable and if the second, from where do I take the power supply into the inertia switch (and by that I would need to know which specific cable and colour!)? Your fuel tank is the most likely spot. Cut the wire to the fuel pump at a suitable location and strip both ends of the wire (approximately 10mm). The fuel tank gauge for the front gas tank didn't work, and since replacing. Ive also added a relay and a dedicated fuse as the pump was wired direct. Fuel pump relays on VWs from around then had a sensor wire connected to the HT coil. Locate your fuel pump component and wiring and gain access to them. Fuel pump relay wiring diagram Lexus NX300h. The relay takes the Fuel pump's load. Electric Fuel Pump Wiring With Relay And Inertia Switch - Electrical www.classiczcars.com. The switched power (red wire) from the ECC relay goes to the relay coil and then from the relay coil to the computer (light blue\orange wire). You can post now and register later. How do you turn it off? Popular videos. Inertia Switch The inertia switch is in the fuel pump circuit and its contacts are rated for continuous duty on the standard fuel pump. This little black box is designed to function flawlessly forever (or close to it), so it's easy to forget it's there. Cheers Bill. The biggest cause of fire is hydraulic fluid spraying onto the exhaust manifold or even on hot brake discs. Locate the wiring to the fuel pump. this way works very well as i said mine is wired straight to the ignition switch but i put a knock off switch in the line so when the car is not in use and some 1 hot wires it she wont run for long and keeping the fuel line away from the exhaust work great in traffic i put the fuel pump at the front as it's easy to get at MJP6B Member Aug 8, 2012 WVE Universal Safety Switch for all Vehicles with Electric Fuel Pumps; Inertia Activated in . This simple system will shut down your electric fuel pump, making it impossible for someone to steal your automobile. Finally found the inertia switch and the wiring is not cut. Recheck for battery + voltage while cranking over the engine ..(pink/ black strip wire.) There was a huge spike in car thefts last year, we went from 721,885 to 810,400 thefts. 406K views 3 weeks ago *PARTS LIST IN DESCRIPTION BELOW* In this video, I show how I wired an inertia switch into an electric fuel pump circuit. 1995 Ford F150 Fuel Pump Wiring Diagram Cadician's Blog from 2020cadillac.com Ford F 150 Fuel Pump Wiring Diagram . Powered by Invision Community. By using this site, you agree to the following: Terms of Use. Double-check your wiring after installing your fuel pump kill switch to ensure that your pump does not turn off on its own. it was not tripped, , looked like the connector got hot. Amounts shown in italicized text are for items listed in currency other than Canadian dollars and are approximate conversions to Canadian dollars based upon Bloomberg's conversion You cannot paste images directly. To be used with fuel pump inertia cut-offswitch Available in our shop, For full fitting instructions see here: Our inertia switch is not the one shown in the manual, (and neither is the fuel pump nor filter but hey ho! Fuel pumps are designed to run off of the electrical system in a vehicle. yes it is ,you have to check the connector at the tank to see if that is where the problem is,sometimes you can lower the tank just enough to get the connector off and back on again..it is important to check at the tank first ,and trace the circuit backwards to tell if the pump is bad or the connector,these have a tendency to get bad connections Pasted as rich text. The OE lead to the pump from the ignition switch, is used to control the relay, so that need only carry a low current, and save its poor old wires. Sep 17, 2003. Connect the fuel pump cutoff switch to the fuel pump. Step 3: Install Your Fuel Pump Kill Switch, Step 4: Disconnect the Power Line to Your Fuel Pump, Tip 3: Utilize the Appropriate Wire Gauge, Tip 4: Keep your Fuel Pump Kill Switch Hidden. Thanks for the reply.Just to confirm, I can cut into the inertia switch circuit without check engine warning light coming on or 'confusing' the canbus system, Yes, thanks,that's a good idea, will do that. References(1) hazardous working environment https://www.webmd.com/a-to-z-guides/occupational-hazards(2) anti-theft strategy https://www.sciencedirect.com/topics/computer-science/theft-prevention. Get the smallest switch you can that will handle the amperage. 7. . Take a look at some of our related articles below. 2002 Chrysler Sebring Fuel Inertia Switch Location - Questions (with www.fixya.com. I don't think the switch is rated to handle the actual pump current. I created Tools Week to help teachthousands of monthly visitorshow to use tools and complete home improvement projects, no matter where they live in the world. Rather than taking chances, always use an automotive relay and an appropriately graded kill switch. MG MGF FUEL PUMP INERTIA SHUT OFF SWITCH WQT100030 4B8. Brand New. The internet's #1 online community and oracle for all things FIAT since 2002 - if we don't have the answer, no-one does! Concerned about Canbus, It's not a physical switch these days it's tied into the airbag ECU (at least on most fiat cars), It is physical switch, in the passenger footwell, Simple way of checking would be to unplug the wiring loom to it and see if it still runs or not. Bring power to the C ( common) and the output to the fuel pump relay goes from the NC ( normally closed). For doing this, or any other electrical repair, I highly recommend using Scotch 33 electrical tape instead of the regular cheapo 69 rolls. F150 Fuel Pump Replacement | Doovi www.doovi.com. As the dust cleared - THE JET ENGINES WERE STILL RUNNING!!!!!!!! If none found, check for power supply on the + terminal of the coil with the key on. If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page.. Faringdon, Oxfordshire UK. Ask a question to our experts and in the near future the answer will appear on this page! Thanks for the diagram - but, although you state that it is there, the Inertia Switch is missing! 30.00. Had a bad afternoon fitting fuel pump and inertia switch (damaged wiring loom) but that is another story, the manual again is of limited help. Where is the fuse box located on a Lexus NX300h? no start. Click & Collect. This inertia switch is a good safety feature when using an electric fuel pump. In case you don't know the inertia switch, it is designed to shutoff the fuel pump in the event of a collision, as to not create a fire hazard if a fuel line is damaged . The intent was to take it down at 1500ft/minute (compare landing 200ft/min) to simulate a survivable crash. Price: Alternate: No parts for vehicles in selected markets. checked inertia switch first. it has a red button at the top and doesn't fit the connector on the loom, picture below. windows work great but when replacing the door parts together again and lining up the door knob wire it cam.. Mazda 626 . 7. If the wiring and switch do not add any significant resistance, the Canbus will not know it is there. Part Number: C41220AX Quantity: Backorder Add to wishlist Joe Padavano LATECH Save Reply Quote F fourbarrel Registered Joined Apr 11, 2017 The only time the inertia switch should trip is during a collision. When youve finished installing your kill switch, you can turn off your gasoline pump at any moment. The inertia switch is fitted to the PI cars to cut the engine in the event of a shunt. It takes the pressure (if you excuse the pun) of having to keep one eye on the gauge. The control path consists of the computer, and the fuel pump relay coil. You can hear the gasoline pump click or buzz for two or three seconds after it turns on. 1991 Ford F 150 Fuel Pump Relay Location | Get Free Image About Wiring elsalvadorla.org. . One is the supply from the battery, one is the feed to the relay, and the third goes to a warning light. Resets with a simple push on the forward end of the switch. Mount or hide your switch somewhere safe and accessible only to you. It turns the fuel pump relay on or off under computer control. You are using an out of date browser. The inertia switch is fitted to the PI cars to cut the engine in the event of a shunt. The electrical circuit for the fuel pump has two paths, a control path and a power path. Didn't find an answer on the Fuel pump relay wiring diagram of the Lexus NX300h? Here are just a few of these below: (2). Install the switch in your desired spot. I would only add a relay if you are using an aftermarket fuel pump that draws significantly more amps than the standard one. But your Facet cube takes less than 2 amps to keep your carburettors topped up, so no relay required. Wiring diagram for connector at fuel pump. Inertia switches or roll over valves are often the means of shutting down fuel pumps in case of accidents. My inertia switch is from a '95 and the 95 wiring diagrams show it wired in line with the pump. One of them involved running the power for the pump through the inertia. Top Rated Seller. This is where you wire to the pump ( You should actually use a relay as the inertia switch is probably not designed for high current long term use) If the switch is tripped then the NC . switch fuel inertia ford pump shut ranger mustang explorer truck taurus f150 . . First of all be advised Ford inertia switches only operate a relay. The inertia switch is a black rubber button mounted on the nearside inner wing (from memory!) Actually if you put it before the relay amperage is minor, but get a tiny switch and hide it well. there was a bump in the road and when she went over it the vehicle was jarred and just quit. If it doesn't then you should be able to tap into the wiring a locate a switch elsewhere to immobilise the car, That's a maybe, it would be good to hear from someone who has actually done it without compromising the canbus system. If you're feeling clever the other pin can be used to switch a light to let you know when it has been tripped. The inertia switch is a safety item incorporated by Ford in the fuel system of its vehicles. Thanks for all that information (and good to know I can take the easier option for once!). The other involved the inertia switch being used as the trigger circuit for the pump relay with power being fed directly to the pump from the relay. Ive been re-doing the wiring for my facet fuel pump . Although fast electrical connectors can be used, I highly suggest you solder your connections. Incredible 1995 Ford F150 Fuel Pump Wiring Diagram 2022. $75.79: Alternate: Quantity: Add to Cart. i found a that in the plug wire to the inertia switch had been pinched and the white wire . C $35.87. I've ordered a Delphi GT280 pick and am hoping I can switch the female connectors within the supplied plug; if not I'll make my own wires with metri-pack females. Hi Menno, You can fit an oil pressure switch, attached is a photo of one fitted to my TR3 and this is wired to a flashing/buzzing LED light on my dash. Feb 25, 2009. More about us. Restore formatting, All the inertia switch does is stop a signal that would normally continue on to the fuel pump in the case of a roll over accident. Just don't want to find out the hard way, Gets more complicated, had a look today. October 11, 2012 in TR2/3/3A/3B Forum. The fuel pump relay should have power to terminal 30 with the ignition off. Electric fuel pump cut-off safety switch connector kit. Thank you kindly for your support!DISCLAIMER:This video is for entertainment only. Having the switch mounted there makes it easy to wire it into the pump and I'm reluctant to add any wiring to the ignition circuit that potentially could add unreliability. Not a good method of theft control every time you park. cutoff, checked the fuses and the fuel pump relay. I use a 4 pin relay, two inline fuses, a. wife was driving the thing when it quit. you can pull apart the connector and with a DVM check for voltage on the fuel pump wire. Works' TR4 Rally car since Oct 1969. Fuel pump wiring diagram Nissan Safari. I use the version of the PBT-GF15 that has three connectors, instead of the usual two. The wires are likely to be just a feed in, and out to the pump. from United States. As for wiring it. . As I am not too confident with things electrical, I seek guidance because I am sure someone here will have done this. fuel inertia fuzion 2020cadillac scannerdanner hiace. Unplug the fuel pump harness and examine for switched current by grounding the black lead of your multimeter. TR2s 1963-1969. If you do not hear the pump the inertia switch should be reset, it will "click" when it is reset. /* Add your own Mailchimp form style overrides in your site stylesheet or in this style block. There's a cut out relay and an inertia switch included (what I didn't mention though). In fact, a petrol fire is most unusual in a crash. Learning how to wire an electric fuel pump to a toggle switch is one of the most powerful strategies to deter automobile thieves. Also, ensure theres an adequate area for the switch assembly and wiring beneath the switch. :L inside then engine bay. #7. This means if the engine stops then so does the fuel pump. Terminal 87 will have power for 2 . (1), When performing this anti-theft strategy, there are a few crucial considerations to keep in mind. We and our partners use cookies to Store and/or access information on a device. I bought a 2 wire inertia switch off ebay, which came from a Rover 25, to make the install safer. If youre certain the pump isnt inside the tank, trace the fuel line from the tank to the engine until you find it. That's what we have to look for. An electric motor usually powers it, and it can be located either inside or outside of the vehicle. Please enable JavaScript on your browser to best view this site. I then dropped the tank. Anyone watch "The Plane Crash" last night Ch.4 I think? However, there are other occurrences that can trip an inertia switch, such as a blown tire or simply hitting a pothole in the road. Turn the ignition switch to position 'II', pause for a few seconds, then return the key to position '0'. To secure the switch in place, insert it from the back and tighten the ring nut on the switch body on the outer side. The inertia switch is made for low current. . Write. This phase is simple and uncomplicated if youve purchased a complete kill switch kit. **PARTS LIST IN DESCRIPTION BELOW**In this video, I show how I wired an inertia switch into an electric fuel pump circuit. Check if you can route the cables to the outside of the car through the floor. An inertia switch will only stop fuel supply, it won't stop the engine immediately. Web wiring ford f150 pump 2007 diagram fuel 1992 wire switch ecu electrical diagrams inertia power 2carpros ground. First suggestion is simply to break into the power line to the pump so that power to the pump is simply routed through the inertia switch. In the car, you will do everything yourself, and help all your friends! 2003 Jeep Wrangler: Tested..starting Fluid..fluid To See If Fuel Pump www.justanswer.com. Your fuel pump wire should be cut and spliced. How do I reset my fuel inertia switch on a 2003 Nissan Safari? 1) Test for spark at the plug end of the wire using a spark tester. Your link has been automatically embedded. turn the key and it doesn't even make noise. Please familiarise yourself with our Terms and Conditions. fuel pump replacement ford escape f150 install 2001 2004. Hello, I'm Sam. jeep wrangler 2003 fuel pump diagram 4l sensor position starting engine location fluid wire brownjeff 2009 justanswer tested ad20 68d7. I have found that i am getting no power to the fuel pump, i have jumped power to the pump and it works. but nothing when touched to pink w/blk stripe or green w/yellow stripe? Don't rush to leave! There is no power to the fuel pump relay from neither the EEC or the ignition when the jumper wire is disconnected from the coil. Contains connector body and electrical contacts to enable the wiring loom to be connected to the switch. Description Electric fuel pump cut-off safety switch connector kit. Seems this replaced the intertia switch approch. Helpful, if your engine suddenly cuts out for 'no reason'! For that reason, it should not be fitted to rally cars using an electric pump, as it might cut the engine when road conditions are severe! ACDELCO Professional; Wiring Instructions Not . We recommend moving this block and the preceding CSS link to the HEAD of your HTML file. 2019 Ducato, can I cut into the wiring on this switch to add a hidden remote sucurity switch ? Switch the key to "ON" and the fuel pump should be heard running for a second or two. It usually requires a bump of some sort, such as hitting a wall! And you are correct, the computer can't handle high current switching, which is why a relay is needed - to protect the computer, not the pump wiring. Which is out and what's the other one doing. Today we have a guest writer, Rafael Lizarraga (Rafiki) hes been a stereo/ auto security installer for cars for the past 20 years and used this method a hundred times. Run it on the control wire, not the high-current wire from the battery to the fuel pump. The computer provides the ground path to complete the circuit. 4 watching. A bit more clarity would help. The fuel pump relay is responsible for supplying power to the fuel pump, and if it goes bad, the car will not be able to start. I'd like to have a factory inertia switch for street driving, but from what I hear they pop off all the time once you hit the rough stuff off road. Good point Ryan about the relay contacts sticking, I was thinking . Thanks again and the switch I mentioned is used on Landrovers - so got that right. The inertia switch has three pins, you want to connect the two pins that are disconnected when the switch is tripped to the fuel pump +ve feed. Under full load with acceleration, the pump could easily pull 10 amps or more (Sean Hyland says up to 30 amps) and fry the switch. Is there a way that someone has come up with to wire in a factory inertia switch to the fuel pump in an efi application, that also has a bypass switch of some sort for wheelin time? Find your vehicles electric fuel pump. Mar 25, 2009. The switch functions correctly with "C" and "NC" wired. I tried resetting the fuel. Your kill switch protects your car wiring by cutting electricity to your pump when necessary. myeates - 16/2/11 at 05:43 PM. It doesnt matter how you get to your gasoline pump assembly. has fuel pump problem but now its back with a no start problem.. 1986 e350 460 winnebago problems . Rob Technical Registrar @ Technical@mgfregister.org http://mgf.ultimatemg.com/ boulton37 Posts: 12 Joined: Mon Jan 27, 2014 5:19 am MGF Register Region: North West Re: fuel pump and fuel relay problem Ford had 2 methods of wiring the fuel pump, pump relay, and inertia switch. When the inertia switch cuts off the relay and pump, it turns the light on to show that it has triggered. And ensure that the inertia swith you buy comes with the connector to the loom.