Ford B2109 OBD-II Trouble Code Definition: B2109 Heated Wind Shield Relay Short to Vbatt (changed from Failure 2/6/97) B2109 Ford OBD-II Trouble CodeDescription: B2109 Heated Wind Shield Relay Short to Vbatt (changed from Failure 2/6/97) OBDII Engine Light Sorry no other information,Please help us to improve,Any information is appreciated.Thanks. […]