F 150 2WD Pickup V8-5.4L SOHC VIN 5 (2004)
Test X4-X5
Normal Operation
The trailer battery charging is accomplished through the use of the trailer tow battery charge relay. The trailer tow battery charge relay is supplied
power and ground through the central junction box (CJB). When energized, the trailer tow battery charge relay routes power from the CJB to the
trailer tow connector through circuit 49 (OG).
Possible Causes
-
circuit 49 (OG) open
-
trailer tow battery charge relay
-
CJB
