IPC Back Lighting Will Not Dim With Dimming Control Knob - keywords dim dimmer inop inoperative instrument IP lamp light panel

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Some customers may comment that their Instrument Panel Cluster (IPC) back lighting may not dim with the dimming control knob. This will only occur in daylight conditions if the headlights or park lights are turned on manually. The rest of the backlighting components (Radio, HVAC and Switches) will dim normally from the dimmer switch when the headlamps are on regardless of the input type and lighting condition. When the ambient light sensor determines it is dusk/dark outside, the IPC will then dim in conjunction with the rest of the backlighting components regardless of headlight switch position.

Normal operation. No repairs are recommended for this concern. Compare operation to a like vehicle so the customer understands that the vehicle is operating as designed.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.