B1C77 Code: Meaning, Causes, and Symptoms | OBD2 Codes

B1C77 – Rear Wiper Relay Circuit


B1C77 Possible Symptoms


Engine Light ON (or Service Engine Soon Warning Light)


B1C77 Possible Causes


Faulty Rear Wiper Relay,Rear Wiper Relay harness is open or shorted,Rear Wiper Relay circuit poor electrical connection


B1C77 Description


The Body Control Module (BCM) monitors the Rear Wiper Relay. The BCM sets the OBDII code when the Rear Wiper Relay is not to factory specifications.