Crown Vic Crank No Start

Asked by Whodatis Nov 25, 2020 at 10:19 AM about the 2009 Ford Crown Victoria

Question type: Maintenance & Repair

2009 Crown Vic P71
Cranks but NO power to the PCM. Fuses
good, relays good, diodes good. No power to
diode in distribution box. That diode has been
swapped with known working diodes. The
Relay that gets its power from the fuel pump
has power but only on the pin that connects
to the FP. If I run 12v directly to both sides of
the diode(Haven’t tried one side) the car then
is able to start. So I’m guessing the problem is
between the battery and the pcm. Maybe a
broken wire? Any help please

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