GM Service Manual Online
For 1990-2009 cars only

Important: 

   • The folding top pump assembly has voltage applied from the WINDOWS CKT BRKR 30A. The WINDOWS CKT BRKR 30A is controlled by the Retained Accessory Power (RAP) module.
   • For a complete understanding of the RAP operation, refer to Retained Accessory Power (RAP) Circuit Description in Body and Accessories.
   • Do not attempt to operate the power folding top unless the vehicle is parked.
   • Release all of the latches before lowering the power folding top.
   • Re-engage all latches after raising the power folding top.

Voltage is applied from WINDOWS CKT BRKR 30A to the folding top switch through circuit 341 when the ignition switch is in RUN, ACCY or the vehicle in in the RAP mode.

The folding top pump assembly receives the ground through the folding top switch, which is grounded through G201, circuit 1550.

There is also a folding top relay option which also provides ground to the folding top switch. The folding top relay receives voltage from the WINDOWS CKT BRKR 30A through circuit 341. The relay receives ground through circuit 816/434 from the park neutral position switch in the PARK or NEUTRAL position, circuit 451, and G110. As long as the vehicle is in PARK or NEUTRAL, ground is provided to the relay. With power and ground to the relay the solenoid within is energized closing the internal switch. This allows ground from G201, circuit 1350 to the folding top switch. This feature allows the folding top to only open and close when the vehicle is in the PARK or NEUTRAL position.

The folding top pump is driven by a reversible permanent-magnet motor. The motor is controlled by the folding top switch, which is normally closed to the ground. When the folding top switch is moved to the UP position, battery voltage is provided to the folding top pump assembly through circuit 162. The folding top pump assembly will receive ground 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.

Operation of opening the power folding top is identical as described above except voltage is applied through circuit 163 and ground through circuit 162.