Diagnostic Aids

WARNING: This page is about a different variant/trim than selected.

NOTE: Functions may not be available if operator has deprogrammed them.

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

Fig 1: Identifying Auxiliary Powertrain Control Module

Courtesy of FORD MOTOR CO.

Fig 2: Identifying Auxiliary Powertrain Control Module Circuits (Econoline)

Courtesy of FORD MOTOR CO.

Fig 3: Identifying Auxiliary Powertrain Control Module Circuits (F250-550)

Courtesy of FORD MOTOR CO.

Fig 4: Identifying Auxiliary Powertrain Control Module Circuits (F650-750)

Courtesy of FORD MOTOR CO.

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)

⁽¹⁾	See Fig 2-Fig 4 .