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Unread 06-07-2014, 16:29
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Al Skierkiewicz Al Skierkiewicz is online now
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Re: Ford auto mechanic?

Don,
I agree that the prime connector is to run the pump without running the vehicle. This is likely a test procedure to check the pump pressure.
Ether, The wire #37 is the wire I said runs across the engine compartment from the fuse block on the passenger side. You should be able to feel the relay engage when commanded or at least hear it. Since the supply line is "hot" all the time, the PCM supplies ground to turn on the relay. The interesting part is having the transmission switch on this part of the diagram. It makes you wonder if the transmission switch has something to do with the fuel pump relay circuit.
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Al
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