Test V: The Fog Lamps Are On Continuously

PINPOINT TEST V: THE FOG LAMPS ARE ON CONTINUOUSLY

V1:

V2-V7:

V8:

Normal Operation
The smart junction box (SJB) sends a voltage reference signal to the headlamp switch through circuit 1406 (YE/LG). When the fog lamp switch is engaged, the signal is routed to ground. When the SJB detects a request for the fog lamps, the SJB provides voltage to the fog lamp relay coil through circuit 1347 (DB/WH) and the fog lamp on indicator through circuit 1407 (LB/OG). When the fog lamp relay is energized, voltage is routed to the fog lamps through circuit 1776 (TN/OG).

Possible Causes
- Circuit 1347 (DB/WH) short to voltage
- Circuit 1406 (YE/LG) short to ground
- Circuit 1407 (LB/OG) short to voltage
- Circuit 1776 (TN/OG) short to voltage
- Fog lamp relay
- Headlamp switch
- SJB