Step | Action | Yes | No | ||||
|---|---|---|---|---|---|---|---|
Schematic Reference: Headlights/Daytime Running Lights (DRL) Schematics Connector End View Reference: Lighting Systems Connector End Views or Computer/Integrating Systems Connector End Views in Computer/Integrating Systems | |||||||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information | ||||
2 | Verify that the low or high beam headlamps are always ON. Do the low and high beam headlamps operate normally? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 | ||||
3 | Does the wiper activated headlamp (WAH) function of the wiper system operate normally? | Go to Step 6 | Go to Step 4 | ||||
4 | With the key in RUN and the wiper switch in the OFF position, use the scan tool to monitor the Front Wipers Active input parameter. Does the scan tool parameter display Inactive? | Go to Step 13 | Go to Step 5 | ||||
5 | Test the windshield wiper switch signal 1 circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 21 | Go to Step 20 | ||||
6 | Can you illuminate both low and high beam headlamps at the same time when activating the headlamp dimmer switch? | Go to Step 15 | Go to Step 7 | ||||
7 |
Does the scan tool display Active? | Go to Step 10 | Go to Step 8 | ||||
8 |
Does the scan tool display Active? | Go to Step 14 | Go to Step 9 | ||||
9 | Test for an open or high resistance in one of the following headlamp and panel dimmer switch circuits. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct a condition? | Go to Step 21 | Go to Step 13 | ||||
10 | Remove the headlamp relay. Refer to Relay Replacement in Wiring Systems. Do the low or high beam headlamps remain always ON? | Go to Step 16 | Go to Step 11 | ||||
11 | Test for a ground signal at the headlamp relay control circuit connector terminal. Refer to Circuit Testing and Electrical Center Identification Views in Wiring Systems. Is a ground control signal present? | Go to Step 12 | Go to Step 18 | ||||
12 | Test for a short to ground in the headlamp relay control circuit. Refer to Circuit Testing and Electrical Center Identification Views in Wiring Systems. Did you find and correct a condition? | Go to Step 21 | Go to Step 13 | ||||
13 | Inspect for poor connections at the harness connector of the BCM. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 21 | Go to Step 17 | ||||
14 | Inspect for poor connections at the harness connector of the headlamp and panel dimmer switch. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 21 | Go to Step 19 | ||||
15 | Repair the short to ground in the right or left low or high beam headlamp ground circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 21 | -- | ||||
16 | Repair the short to voltage in the right or left low beam headlamp supply voltage circuit. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 21 | -- | ||||
17 | Replace the BCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 21 | -- | ||||
18 | Replace the headlamp relay. Refer to Relay Replacement in Wiring Systems. Did you complete the repair? | Go to Step 21 | -- | ||||
19 | Replace the headlamp and panel dimmer switch. Refer to Headlamp Switch Replacement . Did you complete the repair? | Go to Step 21 | -- | ||||
20 | Replace the turn signal/multifunction switch. Refer to Turn Signal Multifunction Switch Replacement in Steering Wheel and Column. Did you complete the repair? | Go to Step 21 | -- | ||||
21 |
Did you correct the condition? | System OK | Go to Step 3 | ||||
