Help Please! CBR600F4i - Switching headlight on cuts engine

[jcelee]

Hi,

On my ride home today the bike cut out within half a mile of the office. The high beam light came on dimly even when high beams were not on as it cut out. I found switching the headlights off completely allowed the bike to start and keep running.

I tried several times on the way home to switch the headlights on and every time it would cut the engine (it would start again fine no problem each time). I could run sidelights but not dipped headlights. I also found that the main beam light would illuminate dimly on the dash when I indicated sometimes too but it didn't cut the engine.

I'm thinking this could be an earthing problem? Any ideas what I should check?

Many thanks!

[jcelee]

I'll check the charging circuit over the weekend. Too noisy now the kids are in bed! I'll follow your better judgement but I'm not convinced, the battery seems very good.

[jcelee]

Thank you, I'll try to check all of the obvious things and have to hand it to the garage if nothing fairly simple comes to my attention. Sadly I don't have a lot of time to spend on it...

[jcelee]

I spoke to my friendly local bike garage (who are fully booked until 30th..) and think we've narrowed it down to a short between the light switch/starter button and the multi plug on the end that part of the loom. Any idea where that multi plug is located?

I did check the charging circuit as a matter of course and its working fine (constant 14.7v regardless of revs)

[jcelee]

Problem solved

It turned out to be bad contacts on the headlight relay, hopefully having cleaned those contacts will keep it working....

Thanks for all of your suggestions