95 EVTM Power Windows
IF THE IMAGE IS TOO SMALL, click it.
'80-97 similar.
The notation for the R window switch is inaccurate: the switch actually provides a CONTINUOUS ground to both motor wires, and momentarily switches one hot to drive the motor.
The one that gets switched determines the motor's direction.
For more info on tailgate operation, see:
http://www.supermotors.net/vehicles/registry/2742/12689 
