E 450 V10-6.8L (2008)
R1-R2
Test S: The Trailer Lamps Are Inoperative - Trailer Stop/Turn Lamp
PINPOINT TEST S: THE TRAILER LAMPS ARE INOPERATIVE - TRAILER STOP/TURN LAMP
Normal Operation
The trailer tow stop/turn lamp relay coils are provided voltage through circuit 9 (LG/OG) (LH rear stop/turn) and circuit 5 (OG/LB) (RH rear
stop/turn) when the brake pedal is applied. Ground for the trailer tow stop/turn lamp relay coils is provided through circuit 57 (BK). Voltage for the
trailer tow stop/turn lamp relays switch side is provided by the battery junction box (BJB) fuse 26 (20A) through circuit 212 (DB). When the trailer
tow stop/turn lamp relay is energized, voltage is routed to the trailer tow connector through circuit 52 (YE) (LH stop/turn) and/or 64 (DG) (RH
stop/turn).
This pinpoint test is intended to diagnose the following:
