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 inoperative. 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 LO position, use the scan tool to monitor the Front Wipers Active input parameter. Does the scan tool parameter display Active? | Go to Step 12 | Go to Step 5 | ||||
5 | Test the windshield wiper switch signal 1 circuit 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 20 | Go to Step 19 | ||||
6 |
Does the scan tool display Active? | Go to Step 9 | Go to Step 7 | ||||
7 |
Does the scan tool display Active? | Go to Step 13 | Go to Step 8 | ||||
8 | Test for one of the following conditions in the 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 20 | Go to Step 12 | ||||
9 |
Do the low or high beam headlamps illuminate? | Go to Step 10 | Go to Step 14 | ||||
10 | 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 16 | Go to Step 11 | ||||
11 | Test for an open or high resistance 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 20 | Go to Step 12 | ||||
12 | 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 20 | Go to Step 15 | ||||
13 | 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 20 | Go to Step 17 | ||||
14 | Inspect for poor connections at the harness connector of the underhood fuse block and terminals at the beam select relay. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 20 | Go to Step 18 | ||||
15 | 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 20 | -- | ||||
16 | Replace the headlamp relay. Refer to Relay Replacement in Wiring Systems. Did you complete the repair? | Go to Step 20 | -- | ||||
17 | Replace the headlamp and panel dimmer switch. Refer to Headlamp Switch Replacement . Did you complete the repair? | Go to Step 20 | -- | ||||
18 | Replace the beam select relay. Refer to Relay Replacement in Wiring Systems. Did you complete the repair? | Go to Step 20 | -- | ||||
19 | 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 20 | -- | ||||
20 |
Did you correct the condition? | System OK | Go to Step 3 |