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

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

Y1:

Y1-Y2:

Y3:

Y4:

Y5:

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

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

The battery junction box (BJB) fuse 34 (25A) supplies voltage to both trailer tow turn relays. The trailer tow turn/stop relay coils are grounded through circuit GD123 (BK/GY).

Possible Causes
- Fuse
- Circuit CAT06 (YE) open
- Circuit CAT09 (OG) open
- Circuit CLS18 (GY/BN) open
- Circuit CLS19 (VT/OG) open
- Circuit GD123 (BK/GY) open
- BJB
- Trailer tow turn relay
- Trailer