Code 77
WARNING: This page is about a different car, the 1994 Plymouth Sundance, 1994 Plymouth Acclaim, 1994 Dodge Spirit, 1994 Dodge Shadow, and 1994 Chrysler LeBaron. However, it is still accessible from the selected car via links, so may be relevant.
DRB displays SPEED CONTROL POWER RELAY CKT. Condition is: open or shorted condition detected in speed control relay circuit.