System Components

Window Switches:  The signals from the window switches are monitored by the GM.

The power window switches have a second detent position for the purpose of signalling the one touch feature.

Fig 1: View Of Power Window Switch

Courtesy of BMW OF NORTH AMERICA, INC.

Relay Module:  The RM IV was added for rear window operation in the 4 door and convertible models only.

Similar to the front window relays in the GM, the Relay Module contains the relays for the rear window motors on these vehicles.

The RM IV is located behind the glove box in the electrical carrier next to the GM.

Fig 2: Identifying Relay Module

Courtesy of BMW OF NORTH AMERICA, INC.