1 Headlights not working but pass light ok. Wed Mar 12, 2014 9:30 pm
krambo
Life time member
Hi all - I realise that this topic has been covered already elsewhere in the forums but despite all the useful posts that I found, nothing quite matches my issue.
Having been on a 100 mile plus ride last weekend with several other riders/bikes, it was brought to my attention that my headlight was not on - we normally ride with dipped beam on here in the UK. I did some research on this issue and became convinced that the left-hand switch gear was at fault. It seems to be a fairly common issue on bikes of a similar age to mine (1984 K100RT). When I came to diagnostics, it seems that if the horn also doesn't work then this almost confirms beyond doubt that the left hand switch gear is the culprit - the horn was NOT working. On closer inspection however, I found that one or both wires to the horns were broken/disconnected. Having made good these faults however and with the horn/s now functioning as intended the headlight problems remained. I do have access to a replacement left hand switch assembly from a farmer friend locally with a K100 spares bike. (He has kindly donated a few spares over the years). I probably need to mention at this point that the flasher/pass light functions normally). I still need to check/verify all fuses are in good order before I try the replacement. My question is this - am I on the right track or is there anything else that could be causing the headlight unit not to function as intended by BMW ?
Having been on a 100 mile plus ride last weekend with several other riders/bikes, it was brought to my attention that my headlight was not on - we normally ride with dipped beam on here in the UK. I did some research on this issue and became convinced that the left-hand switch gear was at fault. It seems to be a fairly common issue on bikes of a similar age to mine (1984 K100RT). When I came to diagnostics, it seems that if the horn also doesn't work then this almost confirms beyond doubt that the left hand switch gear is the culprit - the horn was NOT working. On closer inspection however, I found that one or both wires to the horns were broken/disconnected. Having made good these faults however and with the horn/s now functioning as intended the headlight problems remained. I do have access to a replacement left hand switch assembly from a farmer friend locally with a K100 spares bike. (He has kindly donated a few spares over the years). I probably need to mention at this point that the flasher/pass light functions normally). I still need to check/verify all fuses are in good order before I try the replacement. My question is this - am I on the right track or is there anything else that could be causing the headlight unit not to function as intended by BMW ?
Last edited by krambo on Wed Mar 12, 2014 10:04 pm; edited 1 time in total
__________________________________________________
1984 BMW K100RT, 1993 BMW K1100LTIC,1982 Kawasaki KZ1100 Spectre
"Aut viam inveniam aut faciam."