Test Q

PINPOINT TEST Q: THE FOG LAMPS ARE INOPERATIVE

Test Q1-Q5:

Test Q6-Q8:

Test Q9-Q11:

Normal Operation
The SJB sends a voltage signal to the headlamp switch through circuit 1669 (OG/LG). When the fog lamp switch is engaged, the voltage is routed to ground through circuit 1205 (BK). When the SJB detects that the fog lamp switch is engaged, the SJB provides a ground source for the fog lamp relay coil to energize through circuit 1347 (DG/WH). The fog lamp relay receives power from within the BEC. When the SJB grounds circuit 1347 (DG/WH), the fog lamp relay switches voltage to circuits 1721 (LB/BK) and 1776 (TN/OG). Circuits 1721 (LB/BK) and 1776 (TN/OG) provide power to the LH and RH fog lamps respectively. Ground for fog lamps is supplied by the BEC through 1205 (BK).

Possible Causes
- circuit 1205 (BK) open
- circuit 1347 (DG/WH) open or short to power
- circuit 1669 (OG/LG) open
- circuit 1721 (LB/BK) open
- circuit 1776 (TN/OG) open
- fog lamp relay
- headlamp switch
- BEC
- SJB