Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Headlights/Daytime Running Lights (DRL) Schematics DEFINITION: The low beam or high beam headlamps are always ON. | |||
1 | Did you review the headlamps operation and perform the necessary inspections? | Go to Step 2 | |
2 | Place the headlamp switch in the OFF position. Are the headlamps OFF? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
3 | Are the low beam headlamps illuminated? | Go to Step 4 | Go to Step 6 |
4 | Remove the lighting relay. Are the low beam headlamps illuminated? | Go to Step 8 | Go to Step 5 |
5 | Probe the coil side control circuit of the lighting relay with a test lamp that is connected to battery positive voltage. Does the test lamp illuminate? | Go to Step 9 | Go to Step 12 |
6 | Remove the lighting high low relay. Are the high beam headlamps illuminated? | Go to Step 10 | Go to Step 7 |
7 | Probe the coil side control circuit of the lighting high low relay with a test lamp that is connected to battery positive voltage. Does the test lamp illuminate? | Go to Step 11 | Go to Step 13 |
8 | Repair a short to ground in the low beam headlamps control circuit between the low beam headlamps and the lighting relay. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 14 | -- |
9 | Repair a short to ground in the coil side control circuit of the lighting relay. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 14 | -- |
10 | Repair a short to ground in the high beam headlamps control circuit between the high beam headlamps and the lighting high low relay. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 14 | -- |
11 | Repair a short to ground in the coil side control circuit of the lighting high low relay. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 14 | -- |
12 | Replace the lighting relay. Did you complete the replacement? | Go to Step 14 | -- |
13 | Replace the lighting high low relay. Did you complete the replacement? | Go to Step 14 | -- |
14 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
