Mark LT 2WD V8-5.4L VIN 5 (2007)
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
voltage and ground through the central junction box (CJB). When energized, the trailer tow battery charge relay routes voltage from the CJB fuse 103
(30A) to the trailer tow connector through circuit 49 (OG).
Possible Causes
-
Fuse
-
Circuit 49 (OG) open
-
Trailer tow battery charge relay
-
CJB
-
Trailer
