Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
Schematic Reference: Headlights/Daytime Running Lights (DRL) 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.
Did the DRL operate properly? | -- | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
3 | Do the high beam headlamps operate properly? | -- | Go to Step 4 | |
4 |
Is the resistance greater than the specified value? | 31K ohms | Go to Step 5 | Go to Step 10 |
5 | Expose the ambient light sensor to a bright light. Is the resistance less than the specified value? | 23K ohms | Go to Step 6 | Go to Step 10 |
6 |
Does the test lamp illuminate for both circuits? | -- | Go to Step 7 | Go to Step 16 |
7 |
Does the test lamp illuminate with the gear selector out of the park position? | -- | Go to Step 8 | Go to Step 12 |
8 | Disconnect the body control module (BCM). Does the test lamp illuminate? | -- | Go to Step 9 | Go to Step 14 |
9 | Test the ignition 1 voltage circuit of the LCM 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 20 | Go to Step 15 |
10 | Test the ambient light sensor ground circuit for high resistance, an open or a short to battery positive voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 20 | Go to Step 11 |
11 | Test the ambient light sensor signal circuit for high resistance, an open or a short to battery positive voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 20 | Go to Step 13 |
12 | Test the park/neutral position switch park signal circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 20 | Go to Step 14 |
13 | 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 20 | Go to Step 17 |
14 | Inspect for poor connections at the harness connector of the BCM. 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 20 | Go to Step 18 |
15 | 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 20 | Go to Step 19 |
16 | Repair the high resistance or open in the LCM battery positive voltage circuits. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 20 | -- |
17 | Replace the ambient light sensor. Refer to Ambient Light Sensor Replacement . Did you complete the replacement? | -- | Go to Step 20 | -- |
18 |
Important:: Perform the setup procedure for the BCM. Refer to Body Control Module (BCM) Programming/RPO Configuration in Body Control System. Replace the BCM. Refer to Body Control Module Replacement in Body Control System. Did you complete the replacement? | -- | Go to Step 20 | -- |
19 | Replace the LCM. Refer to Lamp Control Module Replacement . Did you complete the replacement? | -- | Go to Step 20 | -- |
20 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 2 |
