Automatic Lamp Control Inoperative

WARNING: This page is about a different car, the 2004 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.

Step	Action	Yes	No
Schematic Reference: Exterior Lights Schematics
1	Did you review the Lighting System Description and Operation and perform the necessary inspections?	Go to Step 2	Go to Symptoms - Lighting Systems
2	Verify the parking lamps are not turning on and off in light and dark conditions. Does the system operate normally?	Go to Testing for Electrical Intermittents	Go to Step 3
3	With the ambient light sensor and the daytime running lamps control module disconnected. Test between cavity 1 of the ambient light sensor harness connector and cavity 18 of the DRL control module harness connector for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 8	Go to Step 4
4	Test between cavity 3 of the ambient light sensor harness connector and cavity 16 of the DRL control module harness connector for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 8	Go to Step 5
5	Test between cavity 4 of the ambient light sensor harness connector and cavity 17 of the DRL control module harness connector for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 8	Go to Step 6
6	Replace the Ambient Light Sensor with a know good Sensor. Refer to Daytime Running Lamps (DRL) Ambient Light Sensor Replacement . Did you correct the condition?	Go to Step 8	Go to Step 7
7	Replace the Daytime Running Lamp Control Module. Refer to Daytime Running Lights (DRL) Control Module Replacement . Did you correct the condition?	Go to Step 8	-
8	Operate the system in order to verify the repair. Did you correct the condition?	System OK	Go to Step 3