Schematic Reference: Interior Lights Dimming Schematics

Did you review the Lighting System Description and Operation and perform the necessary inspections?

Go to Step 2

Go to Symptoms - Lighting Systems

Verify that the IP compartment lamps are inoperative.

Does the system operate normally?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

1. Place the headlamp switch in the PARK position.
2. Observe the tail lamps.

Do the tail lamps illuminate?

Go to Step 8

Go to Step 4

1. Remove the tail lamp relay from the tail lamp relay socket.
2. Test for open between the tail relay socket cavity 3 and ground.

Is there an open to ground in the LT GRN wire?

Go to Step 5

Go to Step 6

Test for B+ at cavity 4 of the TAIL Relay socket.

Was the voltage measured equal to B+?

Go to Step 7

Go to Step 11

Repair the open in the LT GRN wire between the junction block 2, C3 cavity 6 and the daytime running lamps control module. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

Go to Step 12

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Replace the tail relay.

Is the replacement complete?

Go to Step 12

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1. Disconnect the IP lamp dimmer.
2. Test for high resistance between cavity 2 of the IP lamp dimmer connector and ground.

Was there high resistance to ground in the WHT/BLK wire?

Go to Step 9

Go to Step 10

Replace the IP lamp controller. Refer to Instrument Panel Lamp Dimmer Switch Replacement .

Is the replacement complete?

Go to Step 12

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Repair the open in the WHT/BLK wire between IP lamp dimmer connector cavity 2 and ground. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

Go to Step 12

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Replace the junction block 2. Refer to Instrument Panel Wiring Harness Replacement in Instrument Panel, Gauges, and Console.

Is the replacement complete?

Go to Step 12

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3