Test C: One Low Beam Headlamp Is Inoperative

PINPOINT TEST C: ONE LOW BEAM HEADLAMP IS INOPERATIVE

C1-C3:

C3-C5:

C5-C7:

C7-C9:

C9-C12:

C12-C15:

C15 Continued:

Normal Operation - Halogen Headlamps
The LH low beam receives voltage through circuit 29S-LE16 (OG/GN). Ground for the LH low beam is provided through circuit 31S-LE16 (BK/RD). The RH low beam receives voltage through circuit 29S-LE23 (OG/WH). Ground for the RH low beam is provided through circuit 31S-LE23 (BK/WH). The front electronic module (FEM) controls the ground for both low beam headlamps.

Normal Operation - High Intensity Discharge (HID) Headlamps
The LH HID relay coil receives voltage through circuit 29S-LE16 (OG/GN) from the central junction box (CJB). Ground for the LH HID relay coil is provided through circuit 91S-LE16 (BN/YE) and is controlled by the FEM. Battery voltage is supplied to the LH HID relay through circuit 29S-LE31 (OG/YE). When the relay is energized, voltage is switched to the LH ballast through circuit 30S-LE16 (RD/BK). Circuit 31-LE16 (BK/RD) supplies ground to the LH ballast. The RH HID relay coil receives voltage through circuit 29S-LE23 (OG/WH). Ground for the RH HID relay coil is provided through circuit 91S-LE23 (BN/WH) and is controlled by the FEM. Battery voltage is supplied to the RH HID relay through circuit 29S-LE30 (OG/BU). When the relay is energized, voltage is switched to the RH ballast through circuit 30S-LE23 (RD/WH). Circuit 31-LE23 (BK/WH) supplies ground to the RH ballast. The FEM controls the ground for both HID relay coils. The ballasts provide the necessary voltage to illuminate the HID bulbs. The ballast and HID bulb are replaced as an assembly.

Possible Causes
- Fuse
- Circuit 29S-LE16 (OG/GN) open
- Circuit 29S-LE23 (OG/WH) open
- Circuit 31S-LE16 (BK/RD) open or short to voltage
- Circuit 31S-LE23 (BK/WH) open or short to voltage
- Circuit 91S-LE16 (BN/YE) open or short to voltage
- Circuit 91S-LE23 (BN/WH) open or short to voltage
- Circuit 29S-LE31 (OG/YE) open
- Circuit 29S-LE30 (OG/BU) open
- Circuit 30S-LE16 (RD/BK) open
- Circuit 30S-LE23 (RD/WH) open
- Circuit 31-LE16 (BK/RD) open
- Circuit 31-LE23 (BK/WH) open
- HID relay
- Ballast
- FEM