Headlamps Always On - Low or High Beam
Headlamps Always On - Low or High Beam
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Exterior Lights Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems |
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| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 |
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Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 |
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Go to Step 4 | Go to Step 9 |
| 4 |
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Go to Step 20 | Go to Step 5 |
| 5 |
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Go to Step 7 | Go to Step 6 |
| 6 |
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Go to Step 21 | Go to Step 8 |
| 7 | Test the headlamp switch signal circuit for a short to ground. Refer to Circuit Testing
and to Wiring Repairs
in Wiring Systems. Did you find and repair a short to ground in the headlamp switch signal circuit? |
Go to Step 22 | Go to Step 21 |
| 8 | Test the headlamp relay control circuit for a short to ground. Refer to Circuit Testing
and to Wiring Repairs
in Wiring Systems. Did you find and repair a short to ground in the headlamp switch signal circuit? |
Go to Step 22 | Go to Step 19 |
| 9 | Disconnect the turn signal/multifunction switch. Do the headlamps turn OFF? |
Go to Step 10 | Go to Step 11 |
| 10 | Test for a short to ground in the headlamp relay switch supply circuit. Refer to Circuit Testing
and to Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 22 | Go to Step 16 |
| 11 | Are the high beam headlamps always ON? | Go to Step 12 | Go to Step 13 |
| 12 | Repair a short to ground in the headlamp high beam signal circuit. Refer to Circuit Testing
and to Wiring Repairs
in Wiring Systems. Did you complete the repair? |
Go to Step 22 | - |
| 13 |
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Go to Step 14 | Go to Step 18 |
| 14 | Using a test lamp connected to the DRL relay voltage supply circuit, probe the DRL relay control circuit. Does the test lamp illuminate? |
Go to Step 15 | Go to Step 17 |
| 15 | Test for a short to ground in the DRL relay control circuit. Refer to Circuit Testing
and to Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 22 | - |
| 16 | Replace the turn signal/multifunction switch. Refer to Multifunction, Turn Signal Switch Replacement
in Steering Wheel and Column. Did you complete the replacement? |
Go to Step 22 | - |
| 17 | Replace the DRL 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 22 | - |
| 18 | Repair a short to ground in the low beam switched ground circuit. Refer to Circuit Testing
and to Wiring Repairs
in Wiring Systems. Did you complete the repair? |
Go to Step 22 | - |
| 19 | Replace the headlamp 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 13 | - |
| 20 | Replace the headlamp switch. Refer to Headlamp Switch Replacement in Steering Wheel and Column. Did you complete the replacement? |
Go to Step 22 | - |
| 21 | Replace the BCM. Refer to Control Module References
in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? |
Go to Step 22 | - |
| 22 | Connect all components and connectors then operate the system in order to verify the repair. Did you correct the condition? |
System OK | Go to Step 2 |