Diagnostic Aids
WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2002 Ford RV Cutaway, 2002 Ford Pickup, 2002 Ford F550 Super Duty, 2002 Ford F450 Super Duty, and 2002 Ford Excursion. However, it is still accessible from the selected car via links, so may be relevant.
Perform this test only when directed by a symptom test, or if no DTCs are present and Auxiliary Powertrain Control Module (APCM) does not control engine RPM. Auxiliary powertrain control system provides an operator interface to the drive-by-wire powertrain control system to effect charge protection, RPM control and manual throttle control between 1300-2500 RPM. This test is only intended to diagnose the following components and circuits:
- Wiring Harness Circuits (VPWR, GND, BUS (+), BUS (-) & Hi-Mount Brakelight)
- APCM
APCM CIRCUIT WIRE COLOR IDENTIFICATION
| Application & Circuit | (1) Terminal No. (Wire Color) | |||
|---|---|---|---|---|
| Econoline | ||||
| BUS (+) | 1 (Tan/Orange) | |||
| BUS (-) | 3 (Pink/Light Blue) | |||
| GND | 2 (Black) | |||
| PWR | 4 (Red/Light Green) | |||
| F250-550 | ||||
| BUS (+) | 2 (Tan/Orange) | |||
| BUS (-) | 4 (Pink/Light Blue) | |||
| GND | 1 (Black) | |||
| PWR | 3 (Red/Yellow) | |||
| F650-750 | ||||
| BUS (+) | 2 (Tan/Orange) | |||
| BUS (-) | 1 (Pink/Light Blue) | |||
| GND | 3 (Black) | |||
| PWR | 4 (Red/Yellow) | |||
|
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