Possible causes of fault
- 'Short circuit to B+' Continuous lighting of fog light bulb(s) can only be diagnosed when fog light is switched off.
- 'Short circuit to ground or faulty fuse' Failure of fog light bulb(s) can only be diagnosed when fog light 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 fog light 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 fog light is switched on.
- 'Faulty bulb' Partial failure/complete failure of a bulb.