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Electronics Need help wiring something up? Thinking of adding an electrical component to your car? Need help troubleshooting that wiring glitch?

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Old 01-15-2010, 08:43 PM   #1
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Gray fuel pump wire?

trying to diagnose a bad fuel pump. I have 11v at the purple wire. but nothing at the gray wire. where does that wire get its voltage from? thanks
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Old 01-15-2010, 10:45 PM   #2
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Re: Gray fuel pump wire?

If it's the wire I think it is, it gets power either from the fuel pump relay or the oil pressure switch.
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Old 01-16-2010, 11:31 AM   #3
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Re: Gray fuel pump wire?

would that only have power when the key is first turned on and then nothing or should it always have power?
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Old 01-16-2010, 03:34 PM   #4
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Re: Gray fuel pump wire?

Has power for 2 sec with the key turned on (unless the engine is running), and with the oil pressure switch closed... Otherwise, your fuel pump would always run.
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Old 01-17-2010, 04:42 PM   #5
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Re: Gray fuel pump wire?

thanks
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Old 01-17-2010, 04:42 PM
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