Service VME - Convertible Top Does Not Function After Battery DIsconnect - keywords accessories body charging electrical inoperative power roof switch

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

This is a service VME to all Cadillac and Chevrolet dealers regarding battery disconnects. Anytime the battery is disconnected or if the battery is in a rundown condition and requires a charge such as in an extended storage period, the windows need to be initialized in order for the top to operate properly. The top will not operate and the windows express up and down will not function unless the window module knows the window position. This will occur anytime power is lost to the window module; for example, when the battery is disconnected. To initialize the windows both doors must be fully closed, then push the window switches to the up position and hold for five seconds. Once the window module learns the window's position, the top will operate properly. If the door window express up or express down function does not operate, use the window initialization process before attempting any repairs.

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.