Step | Action | Values | 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 | Place the headlamp switch in the PARK position. Do the park lamps illuminate? | -- | Go to Step 3 | Go to Park Lamps Inoperative |
3 |
Do the park lamps illuminate? | -- | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 4 |
4 | Are the headlamps illuminated? | -- | Go to Step 6 | Go to Step 5 |
5 |
Does the scan tool indicate that the ambient light sensor input parameter is within the specified range? | 2.5-5.0 | Go to Step 8 | Go to Step 12 |
6 |
Does the test lamp illuminate? | -- | Go to Step 7 | Go to Step 16 |
7 | Connect a fused jumper between the switch side feed circuit of the park lamp relay and the park lamp switch signal circuit of the park lamp relay. Do the park lamps illuminate? | -- | Go to Step 13 | Go to Step 17 |
8 | Is the park brake indicator in the Instrument Panel Cluster (IPC) ON? | -- | Go to Brake Warning Indicator Always On in Hydraulic Brakes | Go to Step 9 |
9 |
Does the scan tool indicate that the Lights On Chime Input parameter is ON? | -- | Go to Step 15 | Go to Step 10 |
10 |
Does the test lamp illuminate? | -- | Go to Step 15 | Go to Step 11 |
11 | Test for an open or high resistance in the exterior lamps OFF input of the BCM. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 22 | Go to Step 14 |
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 22 | Go to Step 18 |
13 | Inspect for poor connections at the harness connector of the park lamp 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 22 | Go to Step 19 |
14 | 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 22 | Go to Step 20 |
15 | Inspect for poor connections at the harness connector of the Body Control Module (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 22 | Go to Step 21 |
16 | Repair an open or high resistance in the switch side feed circuit of the park lamp relay. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 22 | -- |
17 | Repair an open or high resistance in the park lamp switch signal circuit of the park lamp relay. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 22 | -- |
18 | Replace the ambient light sensor. Refer to Daytime Running Lamp (DRL) Ambient Light Sensor Replacement . Did you complete the replacement? | -- | Go to Step 22 | -- |
19 | Replace the park lamp relay. Refer to Relay Replacement in Wiring Systems. Did you complete the replacement? | -- | Go to Step 22 | -- |
20 | Replace the headlamp switch. Refer to Headlamp Switch Replacement . Did you complete the replacement? | -- | Go to Step 22 | -- |
21 |
Important: Perform the set up procedures for the Body Control Module (BCM). Refer to Body Control Module (BCM) Programming/RPO Configuration in Body Control System. Replace the Body Control Module (BCM). Refer to Body Control Module Replacement in Body Control System. Did you complete the replacement? | -- | Go to Step 22 | -- |
22 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 2 |
