Test C: One Low Beam Headlamp Is Inoperative

PINPOINT TEST C: ONE LOW BEAM HEADLAMP IS INOPERATIVE

C1:

C1-C3:

C4-C6:

C7-C10:

C10-C11:

Normal Operation - Halogen Headlamps
When the smart junction box (SJB) detects the headlamp switch in the HEADLAMPS ON position and the multifunction switch in the LOW BEAM position, the SJB sends voltage through circuit CLF04 (BN/BU) and circuit CLF05 (BU/GN) to the LH and RH low beam headlamps, respectively. Ground is supplied on circuit GD121 (BK/YE) and circuit GD123 (BK/GY) for the LH and RH headlamps, respectively.

Normal Operation - High Intensity Discharge (HID) Headlamps
When the SJB detects the headlamp switch in the HEADLAMPS ON position and the multifunction switch in the LOW BEAM position, the SJB sends voltage through circuit CLF04 (BN/BU) and circuit CLF05 (BU/GN) to the LH and RH HID relay coils, respectively. Ground for the HID relay coils is provided through circuit GD121 (BK/YE). Switched voltage for the LH and RH HID relays is provided from the battery junction box (BJB) through circuit SBB26 (YE/RD) and circuit SBB27 (BU/RD), respectively. When the relays are energized, voltage is routed to the LH and RH headlamps through circuit CLF30 (VT/BN) and circuit CLF31 (YE/GY), respectively. Ground is supplied on circuit GD121 (BK/YE) and circuit GD123 (BK/GY) for the LH and RH headlamps, respectively.

Possible Causes
- Fuse
- Circuit CLF04 (BN/BU) open or short to ground
- Circuit CLF05 (BU/GN) open or short to ground
- Circuit CLF30 (VT/BN) open
- Circuit CLF31 (YE/GY) open
- Circuit GD121 (BK/YE) open
- Circuit GD123 (BK/GY) open
- Circuit SBB26 (YE/RD) open
- Circuit SBB27 (BU/RD) open
- HID relay
- HID bulb
- Ballast
- Headlamp assembly
- SJB