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1. Check fuse 3 in the engine compartment fuse box for battery voltage through it at all times. If OK, access the Powertrain Control Module (PCM) at the rear of the driver side fender apron, and check for battery voltage at all times on the Red/White wire at pin 45 of connector C175b on the PCM. C175b is the middle connector of the three connectors on the PCM. If no voltage is present, service the open wire between fuse 3 and the PCM. Look for problems in the wiring harness that runs across the front of the car, behind the front bumper area, especially where the harness turns the corners at the edges of the radiator supports.2. If battery voltage is present at all times on pin 45 of C175b, check all the PCM grounds and if OK, replace the PCM (PCM configuration may be necessary, using a Ford scan tool or equivalent).
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