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

AC1-AC2:

AC3-AC4:

AC4-AC5:

AC5-AC6:

AC6-AC8:

AC8-AC10:

AC10-AC11:

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).

Possible Causes
- Fuse
- Circuit CAT14 (OG) open or short to voltage
- Circuit CAT23 (GY/YE) open or short to voltage
- Circuit GD123 (BK/GY) open
- Circuit SSB13 (GY/RD) open
- Trailer battery charge relay
- Trailer
- SJB