Ford Repair Questions? Ask a Mechanic for Answers ASAP
Hello, does the check engine light come on when the key is turned to on and do you have power at the relay?
Ok if you jump across the relay do you have power to the fuel pump? Does it come on then?You should have two power sources to the fuel pump relay. and the pcm grounds the fuel pump relay only for a few seconds to prime the fuel circuit
Im sorry, what about the pcm?
No, the pcm sends the signal when it sees a key on demand to prime the pump.long as the eec power relay is working and you have communication with the pcm it should ground the pump but only for a few seconds not all the time.
Here is a schemtaic of the fuel pump circuit if you didnt have it.Do you have communication with the pcm and is it storing any codes for the fuel pump circuit?