Did you perform the Interior Lights Dimming System Check?

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Go to Step 2

Go to Interior Lights Dimming System Check

Turn the headlamp switch to the PARK position.

Do the park lamps operate properly?

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Go to Step 3

Go to Exterior Lights System Check

1. Disconnect the interior dimming switch connector.
2. Measure the voltage between the interior dimming switch connector cavity 4 (YEL) and ground.

Is the voltage within the specified range?

10-15 V

Go to Step 4

Go to Step 7

Measure the voltage between the panel dimming control connector cavity 4 (YEL) and cavity 6 (BLK).

Is the voltage within the specified range?

10-15 V

Go to Step 5

Go to Step 8

Test CKT 44 (DK GRN) for an open. Refer to Testing for Continuity in Wiring Systems.

Is CKT 44 OK?

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Go to Step 6

Go to Step 9

Replace the interior dimming switch.

Is the repair complete?

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Go to Interior Lights Dimming System Check

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Repair the open or the short to ground in CKT 32 (YEL). Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

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Go to Interior Lights Dimming System Check

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Repair the open in CKT 150 (BLK). Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

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Go to Interior Lights Dimming System Check

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Repair the suspect wiring. Refer to Wiring Repairs

Is the repair complete?

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Go to Interior Lights Dimming System Check

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Did you perform the Interior Lights Dimming System Check?

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Go to Step 2

Go to Interior Lights Dimming System Check

Turn the headlamp switch to the PARK position.

Do the park lamps operate properly?

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Go to Step 3

Go to Exterior Lights System Check

1. Disconnect the headlamp switch connector.
2. Connect a fused jumper between the headlamp switch connector cavity 7 (DK BLU) and ground.
3. Measure the voltage between the headlamp switch connector cavity 12 (YEL) and ground.

Is the voltage within the specified range?

10-15 V

Go to Step 4

Go to Step 9

Measure the voltage between the headlamp switch connector cavity 12 (YEL) and cavity 9 (BLK).

Is the voltage within the specified range?

10-15 V

Go to Step 5

Go to Step 10

1. Remove the fused jumper.
2. Reconnect the headlamp switch connector.
3. Turn the headlamp switch to the PARK position.
4. Disconnect the left dimmer module connector.
5. Measure the voltage between the left dimmer module connector cavity B (DK GRN) and ground while slowly turning the panel dimming switch back and forth.

Does the voltage vary when the panel dimming switch is moved?

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Go to Step 6

Go to Step 7

Measure the voltage between the left dimmer module connector cavity D (YEL) and ground.

Is the voltage within the specified range?

10-15 V

Go to Step 11

Go to Step 9

Test CKT 44 (DK GRN) for an open. Refer to Testing for Continuity in Wiring Systems.

Is CKT 44 OK?

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Go to Step 8

Go to Step 12

Replace the headlamp switch. Refer to Headlamp Switch Replacement .

Is the repair complete?

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Go to Interior Lights Dimming System Check

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Repair the open or the short to ground in CKT 32 (YEL). Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

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Go to Interior Lights Dimming System Check

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Repair the open CKT 150 (BLK). Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

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Go to Interior Lights Dimming System Check

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Test CKT 8 (GRY) for an open between the left dimmer module and S239. Refer to Testing for Continuity in Wiring Systems.

Is CKT 8 OK?

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Go to Step 13

Go to Step 12

Repair the suspect wiring. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

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Go to Interior Lights Dimming System Check

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Replace the left dimmer module.

Is the repair complete?

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Go to Interior Lights Dimming System Check

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