Question about 2002 Pontiac Grand Prix

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My fuse to my fuel pump keep shorten out after i start it up?

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Odds are the pump is bad, but it could be the relay or wiring. Try pulling the relay out and using a different one. You could use the horn relay, for example. If the fuse blows again, take the connector off the pump and interrogate both sides with an ohmmeter. The grey and black wires go to the pump. The resistance between these should be really high on the connector and should be at least a few ohms on the tank side. Whichever side has no resistance is shorted. Am I making sense?

Posted on Oct 12, 2010


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I have to prime my chevy blazer to get it to start , it will run after that what could it be

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The fuel pump will run for about 1 second only and then the system computer shuts it off unless the engine starts or is being cranked over with the starter motor, so repeatedly turn the key off and on to keep it running or at least supplied with power. You will hear a low hum near the filler neck if the pump is working. I have this same truck and have replaced the fuel pump twice. One hint never run the fuel level lower than 1/8 tank or the fuel pump will overheat and that shortens the life of the pump dramatically.

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Fuse for fuel pump keeps blowing

Normally fuse blows off if more current passes through it than what it is designed for.

Probably it is worth checking what original fuel pump fuse amps requirements and have the same installed.

Also check the relay if there is a relay set for the fuel pump.

Good luck

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No brake lights no turn signals and no wapers. sounds like a fuse but the fuses r good. also have a chevy trk 1500 z71 5.7 vortec. i replaced the fuel pump and gas tank, ran it for a yr and didnt seem to...

you can first check the bulbs. you can turn on the 4-way flasher to quickly check the turn signal lamps. depending on the year of the truck, you might have a combi switch. the turn signal and wiper controls on the same lever. if they are, you might have a bad connection to the switch or a worn switch assembly. check the brake lamp switch, located at the brake pedal lever. if you have cruse control there will be two switches at that location.
check the fuel pump relay. when you replace the fuel pump make sure you get the correct pump for the truck and engine application. these fuel pumps are in the fuel tank and are keep cool from the fuel. if you constantly run with a 1/4 tank or less it will shorten it's life.

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