Test O: One Turn Signal/Hazard Lamp Is Inoperative

PINPOINT TEST O: ONE TURN SIGNAL/HAZARD LAMP IS INOPERATIVE

O1-O3:

O3-O5:

Normal Operation
The smart junction box (SJB) sends reference signals to the multifunction switch through circuits 1690 (LB/RD) (LH turn input) and 1691 (LG/OG) (RH turn input). When the multifunction switch is switched to the LH or RH turn positions, the voltage signal is routed to ground through circuit 570 (BK/WH). When SJB detects the multifunction switch is in the LH turn position, the SJB sends voltage through circuit 3 (LG/WH) to the LH turn lamps. When the SJB detects the multifunction switch is in the RH turn position, the SJB sends voltage through circuit 2 (WH/LB) to the RH turn lamps. Circuit 57 (BK) provides ground for each turn lamp.

All the turn lamps are individually wired to the SJB. The timed on/off cycle is determined in the SJB and is set to flash approximately 80 times per minute if both the front and rear turn lamps operate correctly. If only 1 turn signal lamp operates, the SJB will flash approximately 160 times per minute.

Possible Causes
- circuit 2 (WH/LB) open
- circuit 3 (LG/WH) open
- circuit 57 (BK) open
- multifunction switch
- SJB