F 450 2WD Super Duty V8-6.0L DSL Turbo VIN P (2006)
AC8 Continued
Normal Operation
The trailer tow battery charge relay coil receives voltage from the central junction box (CJB) fuse 27 (15A) through circuit 295 (LB/PK) when the
ignition switch is in the RUN position. Ground for the trailer tow battery charge relay coil is supplied through circuit 57 (BK). The CJB fuse 107
(20A) supplies voltage to the trailer tow battery charge relay. When the trailer tow battery charge relay is energized, the voltage is routed to the trailer
tow connector through circuit 49 (OG).
Possible Causes
-
Fuse
-
Circuit 49 (OG) open
-
Circuit 57 (BK) open
-
Circuit 295 (LB/PK) open
-
Trailer tow battery charge relay
-
CJB
-
Trailer
