Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
Schematic Reference: Exterior Lights Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems | ||||
1 | Did you perform the Lighting System Diagnostic System Check? | -- | Go to Step 2 | |
2 |
Important:: Vehicle shift lever must be out of the PARK position and the parking brake disengaged in order for the daytime running lamps (DRL) to operate.
Do the headlamps switch between low beam and daytime running lamps (DRL)? | -- | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
3 | Do the headlamps operate properly? | -- | Go to Step 4 | Go to Headlamps Inoperative - Low Beams or Headlamps Inoperative - High Beams |
4 |
Does the test lamp illuminate? | -- | Go to Step 5 | Go to Step 14 |
5 |
Does the resistance vary within the specified range? | 3.5K-200K ohms | Go to Step 6 | Go to Step 8 |
6 |
Is the resistance greater than the specified value? | 31K ohms | Go to Step 7 | Go to Step 9 |
7 | Expose the ambient light sensor to a bright light. Is the resistance less than the specified value? | 23K ohms | Go to Step 13 | Go to Step 9 |
8 | Test the twilight sentinel delay signal circuit for high resistance, an open or a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 18 | Go to Step 11 |
9 | Test the ambient light sensor ground circuit for an open or a high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 18 | Go to Step 10 |
10 | Test the ambient light sensor signal circuit for a high resistance, an open or a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 18 | Go to Step 12 |
11 | Inspect for poor connections at the harness connector of the headlamp 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 18 | Go to Step 15 |
12 | Inspect for poor connections at the harness connector of the ambient light sensor. 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 18 | Go to Step 16 |
13 | Inspect for poor connections at the harness connector of the LCM. 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 18 | Go to Step 17 |
14 | Repair the open or short to ground in the ignition 1 voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 18 | -- |
15 | Replace the headlamp switch. Refer to Headlamp Switch Replacement . Did you complete the replacement? | -- | Go to Step 18 | -- |
16 | Replace the ambient light sensor. Refer to Ambient Light Sensor Replacement . Did you complete the replacement? | -- | Go to Step 18 | -- |
17 | Replace the LCM. Refer to Lamp Control Module Replacement . Did you complete the replacement? | -- | Go to Step 18 | -- |
18 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 2 |
