Interior Backlighting Circuit Test
WARNING: This page is about a different car, the 2006 Chevrolet Monte Carlo and 2006 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect the harness connector at the component with the inoperative backlighting.
- Test for less than 5.0 ohms of resistance between the appropriate ground circuit terminal listed below and ground.
- Headlamp Switch terminal 8
- Instrument Panel Cluster (IPC) terminal 6
- Driver Window Switch terminal F
- Driver Door Lock Switch terminal F
- Outside Rearview Mirror Switch terminal B
- Passenger Window Switch terminal C
- Passenger Door Lock Switch terminal F
- Radio terminal 8 C1
- HVAC Control Module terminal 10 C1
- Driver Information Display Switch terminal 5
- Left Steering Wheel Controls terminal 8
- Right Steering Wheel Controls terminal 1
- If greater than the specified range, test the ground circuit for an open/high resistance.
- Connect a test lamp between the appropriate supply voltage circuit terminal listed below and ground.
- Headlamp Switch terminal 7
- Instrument Panel Cluster (IPC) terminal 8
- Driver Window Switch terminal B
- Driver Door Lock Switch terminal G
- Outside Rearview Mirror Switch terminal E
- Passenger Window Switch terminal B
- Passenger Door Lock Switch terminal G
- Radio terminal 7 C1
- HVAC Control Module terminal 1 C1
- Driver Information Display Switch terminal 4
- Left Steering Wheel Controls terminal 6
- Right Steering Wheel Controls terminal 2
- Ignition ON, command the appropriate Incandescent Dimming or LED Dimming ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.
- If not the specified value, test the signal circuit terminal E for a short to ground. If the circuit tests normal, replace the BCM.
- If the test lamp is always ON, test the supply voltage circuit for a short to voltage. If the circuit tests normal, replace the BCM.
- If all circuits test normal, test or replace the component with the inoperative backlighting.