Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Check Fuse D7 - D6. Is the fuse open? | -- | Go to Step 2 | Go to Step 3 |
2 | Repair a short to ground in circuit 1239. Has the repair been made? | -- | Go to Headlight System Check | -- |
3 | Check Fuse B3 - B4. Is the fuse open? | -- | Go to Step 4 | Go to Step 5 |
4 | Repair a short to ground in circuit 41. Has the repair been made? | -- | Go to Headlight System Check | -- |
5 | Using a test light, backprobe the automatic headlamp control module harness connector C1 terminal D to ground. Is the test light on? | -- | Go to Step 6 | Go to Step 25 |
6 | Check for any Diagnostic Trouble Codes (DTC's). Refer to Diagnostic Trouble Code (DTC) List/Type in Body Control Systems. Are there any DTC's present? | -- | Go to Step 7 | |
7 |
Are the headlamps off? | -- | Go to Step 8 | Refer to Headlamps On in Daylight Conditions |
8 | Using a test light, backprobe between the DRL control module harness connector C2 terminal C and ground. Does the test light illuminate? | -- | Go to Step 10 | Go to Step 9 |
9 | Repair a poor connection or an open in circuit 1239. Has the repair been made? | -- | Go to Headlight System Check | -- |
10 | Using a test light, backprobe between the automatic headlamp control module harness connector C2 terminal F to ground. Does the test light illuminate? | -- | Go to Step 12 | Go to Step 11 |
11 | Repair a poor connection or an open in circuit 41 between S223 and the automatic headlamp control module harness connector C2 terminal F. Has the repair been made? | -- | Go to Headlight System Check | -- |
12 | Using a test light, backprobe between the automatic headlamp control module harness connector C2 terminal C and terminal A. Does the test light illuminate? | -- | Go to Step 14 | Go to Step 13 |
13 | Repair a poor connection or an open in circuit 1750 between the automatic headlamp control module and G201. Does the test light illuminate? | -- | Go to Headlight System Check | -- |
14 | Using a DMM, check for continuity in circuit 10 between the Body Control module (BCM) connector C1 terminal D14 and the automatic headlamp control module harness connector C1 terminal F Is there continuity in circuit 10? | -- | Go to Step 15 | Go to Step 26 |
15 | Using a test light, backprobe between B+ and the automatic headlamp control module harness connector C2 terminal E. Does the test light illuminate? | -- | Go to Step 16 | Go to Step 20 |
16 |
Does the test light illuminate? | -- | Go to Step 18 | Go to Step 17 |
17 | Adjust/replace the park indicator switch. Refer to Park Brake Cable Service/Adjustment in Park Brake. Has the repair been made? | -- | Go to Headlight System Check | -- |
18 | Repair a short to ground in circuit 1830. Has the repair been made and the system rechecked? | -- | Go to Headlight System Check | -- |
19 | Replace the automatic headlamp control module. Refer to Headlamp Control Module Replacement . Has the repair been made? | -- | Go to Headlight System Check | -- |
20 | Cover the ambient light sensor with a dark cloth. Do the low beam headlamps and the park lamps come on? | -- | Go to Step 22 | Go to Step 21 |
21 | Disconnect the ambient light sensor. Do the low beam headlamps and the park lamps turn on? | -- | Go to Step 23 | Go to Step 22 |
22 | Using a DMM, check for a short to B+ in circuit 1137. Is there a short to B+ in circuit 1137? | -- | Go to Step 24 | Go to Step 19 |
23 | Replace the ambient light sensor. Refer to Ambient Light Sensor Replacement . Has the repair been made? | -- | Go to Headlight System Check | -- |
24 | Repair a short to B+ in circuit 1137. Has the repair been made? | -- | Go to Headlight System Check | -- |
25 | Repair a poor connection or an open in circuit 3240 between S235 and the automatic headlamp control module harness connector C1 terminal D. Has the repair been made? | -- | Go to Headlight System Check | -- |
26 | Repair a poor connection or an open in circuit 10 between the automatic headlamp control module harness connector C1 terminal F and S221. Has the repair been made? | -- | Go to Headlight System Check | -- |
