Headlamps Inoperative - Low Beams (Domestic, Europe and Japan)
Headlamps Inoperative - Low Beams (Domestic, Europe and Japan)
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Headlights/Daytime Running Lights (DRL) Schematics (Norway/Sweden)
or Headlights/Daytime Running Lights (DRL) Schematics (Domestic)
or Headlights/Daytime Running Lights (DRL) Schematics (Europe/Japan) Connector End View Reference: Lighting Systems Connector End Views , Body Control System Connector End Views , or Steering Wheel and Column Connector End Views |
|||
| 1 | Did you perform the Lighting Systems Diagnostic System Check? | Go to Step 2 | Go to Diagnostic System Check - Lighting Systems |
| 2 |
|
Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Are both low beam headlamps inoperative? | Go to Step 6 | Go to Step 4 |
| 4 |
|
Go to Step 5 | Go to Step 20 |
| 5 | Connect a test lamp between the supply voltage circuit of the inoperative low beam headlamp and the ground circuit of the inoperative low beam headlamp. Does the test lamp illuminate? |
Go to Step 18 | Go to Step 22 |
| 6 |
|
Go to Step 7 | Go to Step 12 |
| 7 | With a scan tool, command the HDLP LO BM relay ON and OFF. Do hear a click when you command the HDLP LO BM relay ON and OFF? |
Go to Step 10 | Go to Step 8 |
| 8 |
|
Go to Step 9 | Go to Step 15 |
| 9 |
|
Go to Step 17 | Go to Step 14 |
| 10 |
|
Go to Step 11 | Go to Step 21 |
| 11 | Connect a 20 amp fused jumper between the battery positive voltage circuit of the HDLP LO BM relay switch and the supply voltage circuit of the low beam headlamps. Do the low beam headlamps illuminate? |
Go to Step 17 | Go to Step 22 |
| 12 | Test for an open or high resistance in the headlamps on signal circuit of the headlamp switch. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 27 | Go to Step 13 |
| 13 | Test for an open or high resistance in the ground circuit of the headlamp switch. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 27 | Go to Step 16 |
| 14 | Test for an open or high resistance in the control circuit of the HDLP LO BM relay. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 27 | Go to Step 19 |
| 15 | Test for an open or high resistance in the supply voltage circuit of the HDLP LO BM relay coil. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 27 | Go to Step 19 |
| 16 | Inspect for poor connections at the headlamp switch. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 27 | Go to Step 23 |
| 17 | Inspect for poor connections at the HDLP LO BM relay. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 27 | Go to Step 24 |
| 18 | Inspect for poor connections at the inoperative low beam headlamp. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 27 | Go to Step 25 |
| 19 | Inspect for poor connections at the Dash Integration Module (DIM). Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 27 | Go to Step 26 |
| 20 | Repair an open or short to ground in the supply voltage circuit of the low beam headlamps. Refer to Wiring Repairs
in Wiring Systems. Did you complete the repair? |
Go to Step 27 | - |
| 21 | Repair an open or high resistance in the battery positive voltage circuit of the HDLP LO BM relay switch. Refer to Wiring Repairs
in Wiring Systems. Did you complete the repair? |
Go to Step 27 | - |
| 22 | Repair an open or high resistance in the ground circuit of the low beam headlamps. Refer to Wiring Repairs
in Wiring Systems. Did you complete the repair? |
Go to Step 27 | - |
| 23 | Replace the headlamp switch. Refer to Headlamp Switch Replacement (LHD)
, or Multifunction, Turn Signal Switch Replacement (LHD)
or Multifunction, Turn Signal Switch Replacement (RHD)
in Steering Wheel and Column. Did you complete the replacement? |
Go to Step 27 | - |
| 24 | Replace the HDLP LO BM relay. Refer to Relay Replacement (Attached to Wire Harness)
or Relay Replacement (Within an Electrical Center)
in Wiring Systems. Did you complete the replacement? |
Go to Step 27 | - |
| 25 | Replace the inoperative low beam headlamp. Refer to Headlamp Bulb Replacement
. Did you complete the replacement? |
Go to Step 27 | - |
| 26 |
IMPORTANT:
Perform the setup procedure for the Dash Integration Module (DIM). Refer to Body Control Module (BCM) Programming/RPO Configuration (IPM)
or Body Control Module (BCM) Programming/RPO Configuration (DIM)
in Body Control System. Replace the DIM. Refer to Dash Integration Module Replacement (LHD)
or Dash Integration Module Replacement (RHD)
in Body Control System.Did you complete the replacement? |
Go to Step 27 | - |
| 27 | Operate the system in order to verify the repair. Did you correct the condition? |
System OK | Go to Step 2 |