Did you perform the entire Interior Lights Dimming System Check?

--

Go to Step 2

Go to Interior Lights Dimming System Check

Set the headlamp switch to the PARK position.

Do the park lamps operate properly?

--

Go to Step 3

Go to Exterior Lights System Check

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

Is battery voltage measured?

--

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 battery voltage measured?

--

Go to Step 5

Go to Step 8

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

Is CKT 44 OK?

--

Go to Step 6

Go to Step 9

Replace the interior dimming switch. Refer to Instrument Panel Lamp Dimmer Switch Replacement in Instrument Panel, Gauges and Console.

Is the repair complete?

--

Go to Interior Lights Dimming System Check

--

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

Is the repair complete?

--

Go to Interior Lights Dimming System Check

--

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

Is the repair complete?

--

Go to Interior Lights Dimming System Check

--

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

Is the repair complete?

--

Go to Interior Lights Dimming System Check

--

Did you perform the entire Interior Lights Dimming System Check?

--

Go to Step 2

Go to Interior Lights Dimming System Check

Set the headlamp switch to the PARK position.

Do the park lamps operate properly?

--

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 to ground at the headlamp switch connector cavity 12 (YEL).

Is battery voltage measured?

--

Go to Step 4

Go to Step 9

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

Is battery voltage measured?

--

Go to Step 5

Go to Step 10

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

Does voltage vary while turning the panel dimming switch?

--

Go to Step 6

Go to Step 7

Measure voltage to ground from the LH dimmer module connector cavity D (YEL).

Is battery voltage measured?

--

Go to Step 11

Go to Step 9

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

Is CKT 44 OK?

--

Go to Step 8

Go to Step 12

Replace the headlamp switch. Refer to Headlamp Switch Replacement in Wiring Systems.

Is the repair complete?

--

Go to Interior Lights Dimming System Check

--

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

Is the repair complete?

--

Go to Interior Lights Dimming System Check

--

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

Is the repair complete?

--

Go to Interior Lights Dimming System Check

--

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

Is CKT 8 OK?

--

Go to Step 13

Go to Step 12

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

Is the repair complete?

--

Go to Interior Lights Dimming System Check

--

Replace the LH dimmer module.

Is the repair complete?

--

Go to Interior Lights Dimming System Check

--