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Re: No power to fuel pump,where is relay?3.1 liter 96...
The relay is in the fuse block unger the hood it will be labeled fuel pump in the owners manual also should be labeled on the cover of the block don't forget to check the fuse
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A 2002 grand prix 3.8 liter has a fuel pump that is controlled by the PCM. The PCM supplies power to the fuel pump relay. That relay energizes and allows current to flow to the fuel pump.
In order to help with your problem it may be better to describe the problem to give a better idea of what information you need.
define power.
1: can't hear buzz?
2: fuel pressure at the fuel rail is zero PSI cranked.
3: my volt meter tells me the pump has 0vdc across the pump pins cranked?
Ok run a fuseable link to be on the safe side from a other relay if you don't have fire on the fuel pump relay a 20 amp fues should work that way you don't have to look for the short it a pain in the but finding a short
GM CARS DON'T USE A FUEL PUMP RESET BUTTON, THEY HAVE AN OIL PRESSURE CONTROLLED FUEL PUMP CUTOFF SWITCH ON THE ENGINE, IF THE CAR HAS NO OIL PRESSURE AND THE KEY WAS ON THE FUEL PUMP SHUTS OFF.
is the relay ok? i think what you are hearing could be 2 relays at the same time. i think the fuel relay works with another aluminium looking one. there's usually a few of them that are identical so you can swop to check.
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