GM Service Manual Online
For 1990-2009 cars only

Important: 

   • Voltage is applied to the folding top through the Windows Circuit Breaker 30A. The Windows Circuit Breaker 30A is controlled by the Body Control Module (BCM).
   • For a complete understanding of the Retained Accessory Power operation, refer to Retained Accessory Power (RAP) Circuit Description in Retained Accessory Power.
   • Do not attempt to operate the power folding top unless the vehicle is stationary.
   • Release all of the latches before lowering the power folding top.
   • Re-engage all of the latches after raising the power folding top.

Voltage is applied from Windows Circuit Breaker 30A to the folding top switch and the folding top relay (vehicles with ETA only) when the ignition switch is in the RUN position or the ACCY position or the vehicle is in the RAP mode.

As long as the vehicle is in PARK or NEUTRAL, ground is provided to the folding top relay. This feature allows the folding top to only open and close when the vehicle is in PARK or NEUTRAL.

The folding top pump is driven by a reversible permanent-magnet motor. The motor is controlled by the folding top switch. When the folding top switch is moved to the up position, battery voltage is provided to the folding top pump through circuit 162, and ground is provided through circuit 163. This action will drive the power folding top to close. When the switch is released, the switch contacts will return to their normal grounded position.

Opening the power folding top requires voltage to be applied through circuit 163 and ground to be applied through circuit 162.