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Inertia switch & WIRES VERY HOT WITH ENGINE RUNNING

Posted by Anonymous on

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Posted on Jan 02, 2017

jturcotte
  • 8123 Answers

SOURCE: Wires at inertia switch are getting hot and the

Hi, odds are you have a bad fuel pump or a short in the wire to the pump. If you have dual tanks, the short may be in the tank selector switch. Try disconnecting the connector at the pump to see if the short is in the pump or the wire. If the wires at the inertia switch still get hot, the short is in the wire. If not, replace the pump.

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Posted on Jul 08, 2011

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1 Answer

My 00 Jaguar s type fuel pump rest button is stuck in a downward position, and now my car won't start


Wire around the inertia switch, use a jumper wire, same size as wires to and from, that should get you going. Replace the inertia switch. The fuse is only hot with the key on. Remember safety is your responsibility. I can't see what your doing from here.
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Apr 29, 2017 | Jaguar Cars & Trucks

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Where is the fuel pump on a 1999 landrover discovery sd


look for power at the fuel pump connector at the fuel pump in the fuel tank (the wire that should have power when the engine is running or cranking over is White and Purple (maybe White and Pink, I can't remember). These cars also have a fuel pump inertia switch (a crash protection device, if it fails the fuel pump looses power), located passenger side rear of the engine compartment, same type used on Jaguars seen the fail, just press the button on top of the inertia switch to reset it or temporarily bridge the two wires and see if the engine now starts. Fuel pump relay is behind the right front kick panel at passenger right foot well.

Nov 29, 2016 | 1999 Land Rover Discovery

1 Answer

2010 nissan versa got in a collision. Wont crank over. Would the fuel inertia switch cause this?


Fuel inertia switch stops the fuel pump running in the case of a collision causing a broken fuel pipe which otherwise could spray a litre of petrol every few seconds and rather spoil someone's day.

Certainly a tripped inertia switch would prevent the engine from starting but I doubt it would stop the engine cranking, though I don't have up to date information on the model and there could be different safety regulations where you are.
The inertia switches are accessible and resettable so why not just reset it and try again. Your vehicle handbook will have the details.

An immobiliser stops the the engine cranking on some vehicles as well as stopping the spark and injection and often the fuel pump.
Bridging the battery positive wire to the solenoid to make the starter crank the engine won't be switching the rest of the stuff back on.

Feb 06, 2015 | 2010 Nissan Versa 1.8

1 Answer

Working on the window switch it shorted out and the 30 amp fuse got hot let it cool works fine but now my truck wont start cranks great no fuel fuses all good help


did the inertia switch get tripped while working on the window switch? also make sure you have power to the fuel pump past the inertia switch.

Jun 02, 2012 | 2006 Ford F-150

1 Answer

Why dome lights with fade do not work when doors are opened or closed?


All of the items you listed are controlled by the Central Control Unit (AKA body control module) which is located under the right side of the dash behind the glove box.

The CCU has several battery voltage inputs which should be checked:

Fuse #8 (15 Amp), (Hot in RUN or START) and Fuse #15 (20 Amp) (HOT AT ALL TIMES) in passenger compartment fuse block.
Fuse #10 (10 Amp) (HOT AT ALL TIMES) in the engine compartment fuse block, via the inertia switch located ay the left rear side of the engine compartment.

Note: the inertia switch supplies power to pin #18 (BLUE/GREEN wire) at the CCU connector C0428. If there is battery voltage at this pin, the inertia switch is OK.

When you check your fuses, make sure they have power when they are supposed to have power. I have had many people simply LOOK at the fuses and tell me they are OK only to find out that the fuse has no power even though it is not blown. (possible connector or wiring problem to the fuse itself).

If this information is not enough to locate the problem, you will need a scan tool that is capable of two-way communication with your onboard computer network to continue diagnosis.

Apr 05, 2012 | 2003 Land Rover Freelander

1 Answer

Wires at inertia switch are getting hot and the switch has melted, jumped wires and they are getting extremly hot


Hi, odds are you have a bad fuel pump or a short in the wire to the pump. If you have dual tanks, the short may be in the tank selector switch. Try disconnecting the connector at the pump to see if the short is in the pump or the wire. If the wires at the inertia switch still get hot, the short is in the wire. If not, replace the pump.

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Jul 08, 2011 | 1989 Ford F 150

1 Answer

I have a 88 ford ranger 2.9 engine. fuel pumps wont work by passed nertia switch. if I jump a hot wire to the nertia wire in the plug in for the relay the pumps will work.replaced relay still doesn't work....


The red wire should be hot. the inertia switch, when the top button is pushed,makes contact from the red wire to the tan wire which goes to the fuel pump.

Jan 27, 2011 | Ford Ranger Cars & Trucks

1 Answer

Cant find the ineryia switch 1988 bronco2 looked on right side 2.9 injected


The inertia switch is by the passenger left foot, it has Pink/Black & Orange/Blue wires. It’s connector in the engine bay is a Black Rectangular 2-Pin. (Inertia switch connector pictured) 29-50_3.jpg

Mar 04, 2010 | 1988 Ford Bronco II

5 Answers

2005 ford ranger fuel pump relay gets hot and engine dies


Like Laurie Mack said. It is the inertia switch below the glove box. Here is some funny information. DON'T change the fuel pump first. Interesting fact: I bought the new inertia switch from Ford and the install instructions that came with it said to install the switch in the protected area to the right where the fuses are. It is like Ford knows it was a dumb place to put the inertia switch, but they won't let you know until after you buy a new one. I have read at least 20 other people on here that had the same problem I just had.

Dec 31, 2008 | 2005 Ford Ranger

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