Possible causes of fault
- 'Short circuit to B+' Continuous lighting of high beam headlight bulb can only be diagnosed when high beam headlight is switched off.
- 'Short circuit to ground' Failure of high beam headlight bulb can only be diagnosed when high beam headlight is switched on.
- 'Open circuit/short circuit to B+' Continuous lighting of bulb(s) in the event of a 'short circuit to B+', can only be diagnosed when high beam is switched on.
- 'Open circuit/short circuit to B+' No lighting of bulb(s) in the event of a 'disconnection', can only be diagnosed when high beam is switched on.