Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Headlights/Daytime Running Lights (DRL) Schematics | |||
1 | Did you perform the Lighting System Diagnostic System Check? | Go to Step 2 | |
2 |
Do both low beam headlamps illuminate? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
3 | Is only one low beam headlamp inoperative? | Go to Step 10 | Go to Step 4 |
4 |
Do the low beams illuminate? | Go to Step 7 | Go to Step 5 |
5 | Install a fused jumper across the battery positive voltage supply circuit and the switched low beam voltage supply circuit. Do the low beam headlamps illuminate? | Go to Step 8 | Go to Step 6 |
6 | Test for a short to ground in the switched low beam voltage supply circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 15 | Go to Step 9 |
7 | Inspect for a poor connection at the harness connector of 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 15 | Go to Step 11 |
8 | Inspect for a poor connection at the harness connector of the low beam 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 15 | Go to Step 12 |
9 | Inspect for a poor connection at the harness connector of the underhood fuse 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 |
10 | Inspect the inoperative low beam headlamp power supply and ground circuit for a high resistance or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 15 | Go to Step 13 |
11 | Replace the headlamp dimmer switch. Refer to Multifunction, Turn Signal, and Hazard Switch Replacement - On Vehicle in Steering Wheel and Column. Did you complete the replacement? | Go to Step 15 | -- |
12 | Replace the low beam relay. Refer to Relay Replacement in Wiring Systems. Did you complete the replacement? | Go to Step 15 | -- |
13 | Replace the inoperative low beam headlamp. Refer to Headlamp Assembly or Headlamp Bulb Replacement . Did you complete the replacement? | Go to Step 15 | -- |
14 | Replace the underhood fuse block. Refer to Underhood Electrical Center or Junction Block Replacement in Wiring Systems Did you complete the replacement? | Go to Step 15 | -- |
15 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
