Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
Schematic Reference: Headlight Leveling Schematics | ||||
1 | Did you review the Exterior Lighting Systems Description and Operation and perform the necessary inspections? | -- | Go to Step 2 | |
2 | Verify that the headlight leveling is inoperative. Does the headlight leveling operate normally? | -- | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
3 | Inspect the IGN E fuse. Is the fuse good? | -- | Go to Step 4 | Go to Step 10 |
4 | With ignition switch in RUN, test the ignition 1 voltage circuit at the headlamp inoperative leveling actuator connector. Refer to Circuit Testing in Wiring Systems. Is the specified voltage present? | B+ | Go to Step 5 | Go to Step 11 |
5 | Test the ground circuit at the inoperative headlamp actuator connector for continuity to ground. Refer to Circuit Testing in Wiring Systems. Is continuity present? | -- | Go to Step 6 | Go to Step 12 |
6 | Connect a digital multimeter (DMM) from ground to the headlamp leveling motor supply voltage circuit at the inoperative headlamp leveling actuator connector and adjust the headlamp leveling switch from the highest to lowest setting. Refer to Circuit Testing in Wiring Systems. Does the DMM display within the specified range? | 2.0 V-8.0 V | Go to Step 16 | Go to Step 7 |
7 | Test the ground circuit of the headlamp leveling switch for continuity to ground. Refer to Circuit Testing in Wiring Systems. Is there continuity? | -- | Go to Step 8 | Go to Step 13 |
8 | Test the ignition 1 voltage circuit at the headlamp leveling switch connector. Refer to Circuit Testing in Wiring Systems. Is the specified voltage present? | B+ | Go to Step 9 | Go to Step 15 |
9 | With the ignition switch in the OFF position, test for an open, high resistance, short to ground, or short to voltage in the headlamp leveling motor supply voltage circuit. Refer to Circuit Testing in Wiring Systems. Did you find a condition? | -- | Go to Step 14 | Go to Step 17 |
10 | Repair the short to ground in the ignition 1 voltage circuit. Refer to Wiring Repairs and Power Distribution Schematics in Wiring Systems. Did you complete the repair? | -- | Go to Step 18 | -- |
11 | Repair the open or high resistance in the ignition 1 voltage circuit. Refer to Wiring Repairs in Wiring Systems. Is repair complete? | -- | Go to Step 18 | -- |
12 | Repair the open or high resistance in the ground circuit. Refer to Wiring Repairs in Wiring Systems. Is repair complete? | -- | Go to Step 18 | -- |
13 | Repair the open or high resistance in the ground circuit. Refer to Wiring Repairs in Wiring Systems. Is repair complete? | -- | Go to Step 18 | -- |
14 | Repair open, high resistance, short to ground, or short to voltage in the headlamp leveling motor supply voltage circuit. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 18 | -- |
15 | Repair the open or high resistance in the ignition 1 voltage circuit. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 18 | -- |
16 | Replace the inoperative headlamp leveling actuator. Refer to Headlamp Replacement . Is repair complete? | -- | Go to Step 18 | -- |
17 | Replace headlamp leveling switch. Refer to Headlamp Switch Replacement . Did you complete the repair? | -- | Go to Step 18 | -- |
18 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 3 |
