The 7 pin trailer socket is mounted on the rear bumper, and provides lighting and auxiliary power feeds to a trailer or caravan.
Operation
Power Distribution
Feed from the positive battery terminal (C0192) is supplied to fusible link 6 of the under seat fuse box (C0632) on an N wire. Fusible link 6 (C0571) provides a constant battery feed to the lighting switch (C1082 on LHD, C0041 on RHD) on an NU wire.
Exterior Lamps
Tail Lamps
When the lighting switch is turned to the side or headlamp position, current flows across the switch (C1082 on LHD, C0041 on RHD) to fuse 18 and fuse 19 of the passenger compartment fuse box (C0581) on an R wire. Fuse 18 (C0581) provides a feed to the trailer socket (C0499) on an RO wire. Fuse 19 (C0581) provides a feed to the trailer socket (C0499) on an RB wire.
Brake Lamps
When the brake pedal is pressed, the brake pedal switch (C1727 on LHD, C0029 on RHD) provides a feed to the trailer socket (C0499) on a GP wire.
Indicator Lamps
When the column switch (C1739 on LHD, C1042 on RHD) is moved to the LH turn position, it provides a feed to the trailer socket (C0499) on a GR wire. When the column switch (C1739 on LHD, C1042 on RHD) is moved to the RH turn position, it provides a feed to the trailer socket (C0499) on a GW wire.
Hazard Warning Lamps
When the hazard warning switch (C0096) is pressed, it provides a feed to the LH and RH direction indicator circuits simultaneously, on GR and GW wires respectively.
Fog Lamps
When the rear fog lamp switch is pressed, the fog lamp ECU (C1724 on LHD, C0543 on RHD) provides a feed to the trailer socket (C0499) on an RY wire.