Pinpoint Test 1

PINPOINT TEST 1: THE FOG LAMPS ARE INOPERATIVE

Step 1 - 2:

Step 3 - 8:

Step 9 - 14:

Step 15:

Normal Operation
The SJB sends a reference signal to the fog lamp switch through circuit (DL/W). When the fog lamp switch is engaged, the voltage signal is routed to ground through circuit (B/W).

When the SJB detects the fog lamp switch has been pressed, the SJB provides a ground for the fog lamp relay coil through circuit (LB/B). When the fog lamp relay is energized, voltage is sent through circuit (T/O) to the fog lamps. Power to the fog lamp relay is provided through circuit (Y/B).

Possible Causes
- circuit (LB/B) open
- circuit (T/O) open
- circuit (Y/B) open
- circuit (B/W) open
- circuit (DL/W) open or short to ground
- fog lamp relay
- fog lamp switch
- SJB