Test P: The Fog Lamps Are On Continuously
PINPOINT TEST P: THE FOG LAMPS ARE ON CONTINUOUSLYP1:
P2-P3:
Normal Operation
When the parking lamps are on, the smart junction box (SJB) provides voltage to the fog lamp relay coil through circuit 474 (OG/LG). The fog lamp relay coil ground is sent to the fog lamp switch through circuit 477 (LB/BK). When the fog lamp switch is engaged, ground is completed through circuit 57 (BK). Voltage is supplied from the battery junction box (BJB) to the fog lamp relay through circuit 54 (LG/YE). When the fog lamp relay is energized, voltage is routed to the fog lamps through circuit 478 (TN/OG).
Possible Causes
- Circuit 477 (LB/BK) short to ground
- Circuit 478 (TN/OG) short to voltage
- Fog lamp relay
- Fog lamp switch