Headlamps Inoperative - High Beams
Headlamps Inoperative - High Beams
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Headlights/Daytime Running Lights (DRL) Schematics Connector End View Reference: Lighting Systems Connector End Views or Steering Wheel and Column Connector End Views |
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| 1 | Did you perform the Lighting Systems Diagnostic System Check? | Go to Step 2 | Go to Diagnostic System Check - Lighting Systems |
| 2 |
|
Go to Step 3 | Go to Headlamps Inoperative - Low Beams |
| 3 | Place the headlamp dimmer switch in the HIGH BEAM position. Do the high beam headlamps illuminate? |
Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 4 |
| 4 | Are both high beam headlamps inoperative? | Go to Step 7 | Go to Step 5 |
| 5 |
|
Go to Step 6 | Go to Step 17 |
| 6 | Connect a test lamp between the supply voltage circuit of the inoperative high beam headlamp and the ground circuit of the inoperative high beam headlamp. Does the test lamp illuminate? |
Go to Step 16 | Go to Step 19 |
| 7 | Command the HDLP HI BM relay ON and OFF by cycling the headlamp dimmer switch between the LOW BEAM and the HIGH BEAM position. Do hear a click when you command the HDLP HI BM relay ON and OFF? |
Go to Step 10 | Go to Step 8 |
| 8 |
|
Go to Step 9 | Go to Step 20 |
| 9 |
|
Go to Step 14 | Go to Step 12 |
| 10 |
|
Go to Step 11 | Go to Step 18 |
| 11 | Connect a 10 amp fused jumper between the battery positive voltage circuit of the HDLP HI BM relay switch and the supply voltage circuit of the high beam headlamps. Do the high beam headlamps illuminate? |
Go to Step 14 | Go to Step 13 |
| 12 | Test for an open or short to battery positive voltage in the control circuit of the HDLP HI BM relay. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 24 | Go to Step 15 |
| 13 | Test for an open or high resistance in the supply voltage circuit of the high beam headlamps. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 24 | Go to Step 19 |
| 14 | Inspect for poor connections at the HDLP HI 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 24 | Go to Step 22 |
| 15 | Inspect for poor connections at the headlamp dimmer 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 24 | Go to Step 21 |
| 16 | Inspect for poor connections at the inoperative high 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 24 | Go to Step 23 |
| 17 | Repair an open or short to ground in the supply voltage circuit of the appropriate high beam headlamp. Refer to Wiring Repairs
in Wiring Systems. Did you complete the repair? |
Go to Step 24 | - |
| 18 | Repair an open or high resistance in the battery positive voltage circuit of the HDLP HI BM relay switch. Refer to Wiring Repairs
in Wiring Systems. Did you complete the repair? |
Go to Step 24 | - |
| 19 | Repair an open or high resistance in the ground circuit of the high beam headlamps. Refer to Wiring Repairs
in Wiring Systems. Did you complete the repair? |
Go to Step 24 | - |
| 20 | Repair an open or high resistance in the supply voltage circuit of the HDLP HI BM relay coil. Refer to Wiring Repairs
in Wiring Systems. Did you complete the repair? |
Go to Step 24 | - |
| 21 | Replace the headlamp dimmer switch. Refer to Multifunction, Turn Signal Switch Replacement
in Steering Wheel and Column. Did you complete the replacement? |
Go to Step 24 | - |
| 22 | Replace the HDLP HI BM relay. Refer to Relay Replacement (Within an Electrical Center)
or Relay Replacement (Attached to Wire Harness)
in Wiring Systems. Did you complete the replacement? |
Go to Step 24 | - |
| 23 | Replace the inoperative high beam headlamp. Refer to Headlamp Bulb Replacement . Did you complete the replacement? |
Go to Step 24 | - |
| 24 | Operate the system in order to verify the repair. Did you correct the condition? |
System OK | Go to Step 2 |