Group 37 Wiring diagram FH12, FH16 LHD Examples of symbols on wiring diagram Bulb Bulb, full beams and dipped beams Bulb, tail light Alternator Starter motor Washer motor Windscreen wiper motor Solenoid valve with diode Pressure sensor Temperature sensor Level sensor Starting heater Cigarette lighter Horn Rheostat Buzzer Loudspeaker T3009610 4