Test M: The Turn Signal Lamps Are Inoperative

PINPOINT TEST M: THE TURN SIGNAL LAMPS ARE INOPERATIVE

M1:

M2-M4:

M4-M5:

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 the SJB detects the multifunction switch is in the LH or RH turn position, the SJB sends voltage to the appropriate turn lamps.

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 1690 (LB/RD) open
- circuit 1691 (LG/OG) open
- circuit 570 (BK/WH) open
- multifunction switch
- SJB