Diagnostic Aids
WARNING: This page is about a different car, the 2003 Ford Pickup, 2003 Ford F550 Super Duty, 2003 Ford F450 Super Duty, 2003 Ford Excursion, and 2003 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
Enter this test only if directed here from QUICK TEST or another test. This test is only intended to diagnose the following components and circuits:
- Closed Loop Power Relay
- Powertrain Control Module (PCM)
- Battery Positive Voltage (B+)
- Wiring Harness Circuits (SIG RTN, PWR GND, IGNITION SWITCH, VREF, KAPWR & VPWR)
To prevent replacement of good components, be aware the following non-EEC related areas and components may be cause of concern.
- Battery Cables
- Ignition Switch
- Voltage Regulator
- Ground Straps
- Generator