Test Y: The Individual Trailer Lamp Is Inoperative - Trailer Turn/Stoplamp

PINPOINT TEST Y: THE INDIVIDUAL TRAILER LAMP IS INOPERATIVE - TRAILER TURN/STOPLAMP

Y1-Y2:

Y3:

Y4:

Y5-Y6:

Y6 Continued:

Normal Operation
The battery junction box (BJB) fuse 24 (15A) supplies voltage to the LH trailer tow stop/turn relay and BJB fuse 46 (15A) supplies voltage to the RH trailer tow stop/turn relay. The trailer tow stop/turn relay coils are grounded through circuit GD120 (BK/GN).

The trailer tow LH stop/turn relay coil receives voltage from circuit CLS18 (GY/BN) when the vehicle LH rear stoplamp is illuminated. When the trailer tow LH stop/turn relay is energized, voltage is routed to the trailer tow connector through circuit CAT06 (YE).

The trailer tow RH stop/turn relay coil receives voltage through circuit CLS19 (VT/OG) when the vehicle RH rear stoplamp is illuminated. When the trailer tow RH stop/turn relay is energized, voltage is routed to the trailer tow connector through circuit CAT09 (GN).

This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- Joint connector
- Trailer tow stop/turn relay
- BJB
- Trailer