Headlamps Inoperative - Low Beams Domestic
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Headlights/Daytime Running Lights (DRL) Schematics DEFINITION: The low beam headlamps are inoperative, high beam headlamps operate properly. | |||
1 | Did you review the Exterior Lighting System Description and Operation and perform the necessary inspections? | Go to Step 2 | |
2 |
Do the low beam headlamps operate properly? | 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 4 | Go to Step 6 |
4 | Backprobe between the headlamp low beam supply voltage circuit of connector C201 and a good ground. Does the test lamp illuminate? | Go to Step 5 | Go to Step 9 |
5 | Backprobe between the headlamp low beam supply voltage circuit of the underhood junction block connector and a good ground. Does the test lamp illuminate? | Go to Step 10 | Go to Step 11 |
6 | Probe the supply voltage circuit of the inoperative low beam headlamp with a test lamp that is connected to a good ground. Does the test lamp illuminate? | Go to Step 8 | Go to Step 7 |
7 | Test for an open or high resistance in the supply voltage circuit of the inoperative low beam headlamp. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 15 | Go to Step 10 |
8 | Inspect for poor connections at the harness connector of the inoperative 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 15 | Go to Step 12 |
9 | Inspect for poor connections at the harness connector of the turn signal 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 15 | Go to Step 13 |
10 | Inspect for poor connections at the harness connector of the underhood junction block. 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 15 | Go to Step 14 |
11 | Repair an open or high resistance in the low beam supply voltage circuit of the underhood junction block. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 15 | -- |
12 | Replace the inoperative headlamp. Refer to Headlamp Assembly or Headlamp Bulb Replacement . Did you complete the repair? | Go to Step 15 | -- |
13 | Replace the turn signal switch. Refer to Multifunction, Turn Signal, and Hazard Switch Replacement - On Vehicle in Steering Wheel and Column. Did you complete the repair? | Go to Step 15 | -- |
14 | Replace the underhood junction block. Refer to Underhood Electrical Center or Junction Block Replacement in Wiring Systems. Did you complete the repair? | Go to Step 15 | -- |
15 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Headlamps Inoperative - Low Beams Export
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Headlights/Daytime Running Lights (DRL) Schematics DEFINITION: The low beam headlamps are inoperative, high beam headlamps operate properly. | |||
1 | Did you review the Exterior Lighting System Description and Operation and perform the necessary inspections? | Go to Step 2 | |
2 |
Do the low beam headlamps operate properly? | 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 5 | Go to Step 4 |
4 | Inspect the corresponding fuse of the inoperative low beam headlamp for an open. Is the RH or LH HEAD LP LOW fuse open? | Go to Step 11 | Go to Step 6 |
5 | Backprobe the headlamp low beam supply voltage circuit of connector C201 with a test lamp that is connected to a good ground. Does the test lamp illuminate? | Go to Step 10 | Go to Step 8 |
6 | Probe the low beam supply voltage circuit of the inoperative headlamp with a test lamp that is connected to a good ground. Does the test lamp illuminate? | Go to Step 7 | Go to Step 9 |
7 | Inspect for poor connections at the harness connector of the inoperative 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 14 | Go to Step 12 |
8 | Inspect for poor connections at the harness connector of the turn signal 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 14 | Go to Step 13 |
9 | Repair an open or high resistance in the low beam supply voltage circuit of the inoperative headlamp. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 14 | -- |
10 | Repair an open or high resistance in the low beam supply voltage circuit of the headlamp switch. 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 low beam supply voltage circuit of the inoperative headlamp. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 14 | -- |
12 | Replace the inoperative headlamp. Refer to Headlamp Assembly or Headlamp Bulb Replacement . Did you complete the repair? | Go to Step 14 | -- |
13 | Replace the turn signal switch. Refer to Multifunction, Turn Signal, and Hazard Switch Replacement - On Vehicle in Steering Wheel and Column. Did you complete the repair? | Go to Step 14 | -- |
14 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
