Step | Action | Yes | No |
---|---|---|---|
Schematic Reference: Headlights/Daytime Running Lights (DRL) Schematics Connector End View Reference: Master Electrical Component List in Wiring 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 |
Do the low beam headlamps operate properly? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
3 | Are both low beam headlamps inoperative? | Go to Step 4 | Go to Step 9 |
4 |
Does the Headlamp ON Switch parameter display ACTIVE? | Go to Step 6 | Go to Step 5 |
5 |
Does the Headlamp ON Switch parameter display ACTIVE? | Go to Step 14 | Go to Step 12 |
6 |
Does the test lamp illuminate? | Go to Step 7 | Go to Step 11 |
7 | Connect a test lamp between the headlamp low beam relay switch side supply voltage circuit and a good ground. Does the test lamp illuminate? | Go to Step 8 | Go to Step 19 |
8 |
Do both low beam headlamps illuminate? | Go to Step 15 | Go to Step 9 |
9 |
Does the test lamp illuminate? | Go to Step 17 | Go to Step 10 |
10 | Test the headlamp low beam supply voltage circuit for an open, high resistance, or short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 24 | Go to Step 18 |
11 | Test the headlamp low beam relay control 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 24 | Go to Step 16 |
12 | Test the turn signal/multifunction switch ground 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 24 | Go to Step 13 |
13 | Test the headlamp switch headlamp ON signal circuit for an open, high resistance, or short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 24 | Go to Step 16 |
14 | Inspect for poor connections at the C3 harness connector of the turn signal/multifunction 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 24 | Go to Step 20 |
15 | Inspect for poor connections at the headlamp low beam 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 24 | Go to Step 21 |
16 | Inspect for poor connections at the harness connector of the 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 24 | Go to Step 22 |
17 | Inspect for poor connections at the harness connector of the inoperative low beam high intensity discharge (HID) headlamp. 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 24 | Go to Step 23 |
18 | Locate and repair an open or high resistance in the headlamp ground circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 24 | -- |
19 | Locate and repair an open or high resistance in the switch side supply voltage circuit of the headlamp low beam relay. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 24 | -- |
20 | Replace the turn signal/multifunction switch. Refer to Turn Signal Multifunction Switch Replacement in Steering Wheel and Column. Did you complete the replacement? | Go to Step 24 | -- |
21 | Replace the headlamp low beam relay. Refer to Relay Replacement in Wiring Systems. Did you complete the replacement? | Go to Step 24 | -- |
22 | 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 24 | -- |
23 |
Important: Verify that the headlamp ballast connector retaining clip is fully installed. Replace the inoperative HID headlamp ballast. Refer to High Intensity Discharge Headlamp Ballast Replacement . Did you complete the replacement? | Go to Step 24 | -- |
24 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |