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Re: 2000 jimmy fuel relay switch
It should be inside the Fuse Relay Box under the Hood on the Drivers Side. The Diagram of the Relays should be on the Inside of the Cover, If Not, It is in the Owners Manual. Please Rate My Response! Thanks!
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Most likely a Relay is out. Remove one from another say the horn's relay or the A/C's relay and switch it with your lights relay and if the lights are working, go buy a new relay to replace the A/C or horn relay.
The pump is powered by the relay. The relay is grounded by the computer. It gets a ground signal for the first 3 seconds, then only if the computer sees oil pressure or RPM to know the engine is running. You should be able to ground the relay and run the pump for several minutes. After 30 seconds you should be at max pressure. Normal pressure is 15psi for a truck that has throttle body injectors such as a mid 80s model, and 65psi for trucks that have port fuel injection like yours. You may have the wrong pump.
There is no reset switch for the fuel pump in this vehicle according to the stuff I am finding. There is a relay located in the power distribution box under the hood. You will need to test that, if it is working then the problem, assuming it is the fuel pump not powering up, is most likely the fuel pump itself. From what I am seeing these vehicles have a history of fuel pump problems from the Anti Rollover cutoff and accident safety switch built into the pump itself.
Check your starter and check your connections to make sure they are clean and tight. The low fuel pressure won't cause a no crank. Too low could cause a no start but not a no crank. I've had starters be bad right out of the box. But if that starter motor isn't turning either the starter motor is bad or the solenoid attached or the wiring to it is at fault.
Hi, had same problem with my truck. you need to replace your fuel pump because it no longer holds the pressure in your fuel rail. If you cycle your ignition on and off multiple times(this will cycle the fuel pump relay) with out turning over the engine then start it normally, that is the problem.
Fuel pump, fuel relay, fuel regualator, fuel injectors, camshaft positioning sensor, fuel filter, etc. Need special tools to diagnose properly, do you have them? Doubtfull, I don't have all of them and I've spent thousands on my tools. I can do a guessing game with you but I prefeer not to lead you astray.
There is a short in the signal switch mechanism in the steering column. What you hear is the signal relay. When you brake does the sound stop? If it does then this is the reason. Excess wear and conducting grease has created this short. The switch can be acessed by splitting the steering column and using very small tools and fingers!! you can remove it. Detailed instructions can be found on the net. This is a common problem with jimmys, astro vans and pontiacs.
Have you hooked up a fuel pressure gauge to the test port on the rear of the intake, drivers side. You can get a fuel pressure tester for about 40 dollars at a part store. It is a real good tool to have in your toolbox. If your Jimmy can't build 55 psi, it won't start.