Tests AC: The Trailer Battery Charging Is Inoperative/Does Not Operate Correctly

PINPOINT TEST AC: THE TRAILER BATTERY CHARGING IS INOPERATIVE/DOES NOT OPERATE CORRECTLY

Normal Operation
The trailer battery charge relay coil receives voltage from the smart junction box (SJB) fuse 42 (10A) through circuit CAT23 (GY/YE) when the ignition switch is in the RUN position. Ground for the trailer battery charge relay coil is supplied through circuit GD123 (BK/GY). The battery junction box (BJB) fuse 13 (30A) supplies voltage to the trailer battery charge relay switch side through circuit SSB13 (GY/RD). When the trailer battery charge relay is energized, the voltage is routed to the trailer tow connector through circuit CAT14 (OG).

This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring,terminals or connectors
- Trailer battery charge relay
- Trailer
- SJB

AC1-AC3:

AC4-AC5:

AC5-AC6:

AC6-AC7:

AC7-AC9:

AC9-AC11:

AC11-AC12: