Schematic Reference: Interior Lights Schematics

Did you perform the Lighting System Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Lighting Systems

1. Turn the ignition to the ON position.
2. Turn the headlamp switch to the PARK position.
3. Turn the dimmer switch to a high position.

Are all the I/P lamps on?

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

Go to Step 3

Are all of the interior backlighting inoperative?

Go to Step 7

Go to Step 4

Are any of the VF dimming displays inoperative?

Go to Step 15

Go to Step 5

Are both steering wheel control switches illuminated?

Go to Step 13

Go to Step 6

Is one steering wheel control switch illuminated?

Go to Step 10

Go to Step 9

Check the PANEL DIMMING fuse for an open.

Is the PANEL DIMMING fuse open?

Go to Step 22

Go to Step 8

1. Turn the headlamp switch to the PARK position.
2. With the PANEL DIMMING fuse in the instrument panel fuse block.
3. Backprobe the parklamp switch on signal circuit of the PANEL DIMMING fuse with a test lamp that is connected to a good ground.

Does the test lamp illuminate?

Go to Step 11

Go to Step 21

1. Remove both steering wheel control switches.
2. Probe the IP lamp supply voltage circuit of each steering wheel control switch with a test lamp connected to ground.

Does the test lamp illuminate?

Go to Step 19

Go to Step 18

1. Remove the appropriate steering wheel control switch.
2. Probe the IP lamp supply voltage circuit of the appropriate steering wheel control switch with a test lamp connected to ground

Does the test lamp illuminate?

Go to Step 19

Go to Step 18

Test for a poor connection or an open in the I/P lamp fuse supply voltage circuit of the headlamp switch. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 26

Go to Step 12

Test for a poor connection or an open in the I/P lamp supply voltage circuit of the headlamp switch. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 26

Go to Step 23

If a single component is inoperative, test for a poor connection or an open in the I/P lamp supply voltage circuit of the inoperative component. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 26

Go to Step 14

Test for a poor connection or an open in the ground circuit of the inoperative component. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 26

Go to Step 24

Test for a poor connection or an open in the I/P lamp supply voltage circuit of the inoperative VF dimming component. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 26

Go to Step 16

Test for a poor connection or an open in the dimming supply voltage circuit of the inoperative VF dimming component. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 26

Go to Step 17

Test for a poor connection or an open in the ground circuit of the inoperative VF dimming component. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 26

Go to Step 24

Test for a high resistance or an open in the ground circuit of the steering wheel control switches. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 26

Go to Step 20

Test for a high resistance or an open in the IP lamp supply voltage circuit of the steering wheel control switches. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 26

Go to Step 20

Inspect for a poor connection at the harness connector of the steering wheel control switches. 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 26

Go to Step 25

Repair a poor connection or an open in the park lamps switch on signal circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 26

--

Repair a short to ground in the I/P lamp fuse supply voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 26

--

Replace the IP multifunction switch. Refer to Instrument Panel Multifunction Switch Assembly Replacement in Instrument Panel, Gages. and Console.

Did you complete the replacement?

Go to Step 26

--

Replace the inoperative component or bulb.

Did you complete the repair?

Go to Step 26

--

Replace the appropriate steering wheel control switch. Refer to Steering Wheel Control Switches Replacement in Entertainment.

Did you complete the replacement?

Go to Step 26

--

Operate the system in order to verify the repair.

Did you correct the condition?

Go to Diagnostic System Check - Lighting Systems

Go to Step 2