Multiple Electrical Concerns After Headliner Replacement - keywords courtesy CTSY dimming interior instrument light panel

This PI was superseded to update Condition Concern and Recommendation/Instructions. Please discard PIT4570.

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

Technicians may experience one or more of the following symptoms after installing a new headliner assembly:

1. Dome lamps appear inoperative, however, turning on the headlamp switch will activate the dome lamps and the brightness of the dome lamps can be adjusted with the dimmer control.
2. The reverse lamps are always on and the driver's outside Electro-Chromatic Mirror is inoperative (Only on vehicles equipped with Electro-Chromatic Mirror).

1. If you experience concern 1, Please check connector C9 and C10 at the left IP Junction Block. Reports from the field have found pin 8 of connector 9 (circuit 230) swapped with Pin 4 of connector 10 (circuit 157) Please use Si document id: 1706444 for a reference for proper pin location.
2. If you experience concern 2, Please check connector C10 at the left IP Junction Block. Reports from the field have found pin 3 of connector 10 (circuit 38) swapped with Pin 8 of connector 10 (circuit 1691) Please use Si document id: 1706444 for a reference for proper pin location.

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.