Convertible Top Drop Window Function

WARNING: This page is about a different car, the 2009 Ford Mustang. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: The smart junction box (SJB) may also be identified as the generic electronic module (GEM).

When the convertible top switch is operated (to raise or lower the convertible top), the SJB sends a signal on a shared circuit to the 4 window motors to activate a full down operation of all 4 windows. When the rear quarter windows reach the full down position, the full down sensor in each rear quarter window motor sends a signal to the SJB that the windows are in the full down position. At this time, the SJB allows the convertible top to operate (up or down). If the SJB does not see the full down signal from both rear quarter window motors, the convertible top does not operate. Conversely, all 4 windows operate in any convertible top position. This function is to prevent an accidental opening of the convertible top with the windows in the up position causing contact between the windows and convertible top which may result in damage to the convertible top or windows.