Question about 2000 Mercury Grand Marquis

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My 2000 grand marquis ls will not start i cant hear the fuel pump and all at the same time wires radio and power windows stopped working could this be a relay and how do i check them thank you ron

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Check main fuses at battery/fuse in fuse box /

Posted on Mar 18, 2011

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I'd have to test when problem is ongoing. When you first turn on key, no crank, you should hear the pump run for a few seconds then stop. For initial prime, the computer doesn't need rpm signal. Engine cranking, the computer needs to see rpm signal or it won't ground the fuel pump relay. W/o rpm signal, no spark at the plugs and no fuel injector pulse. I know your talking about fuel, but, when problem is ongoing, check spark and fuel injector pulse, engine cranking.
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