brake light kill's engine

[ianmk2250]

hi everyone i'm having a bit of an head scratch moment !

for some reason my brake light (stop light ) as turned i to a kill switch after a couple of minuets of the bike (mk2) running.
so i unpluged the capacitor thing and all is fine plug bit back in and back to a kill switch
dose this mean the capacitor knackerd ?
any help would be greatly appreciated
thanks ian

[knackeredMk1]

There is a short in the loom. When you press the brake peddle you are activating the rear brake light switch which is shorting against the frame somewhere.

[Gammakeith]

Ian says it doesn't do it with capacitor unplugged though which is a bit odd? Could be a failed or failing rec/reg/alternator so that there is barely any volts being fed into the system. Easy to check the capacitor if you have a multimeter as should show no conductivity through it after a few seconds. If that is OK, then measure the voltage at the capacitor with engine running.

Keith

[knackeredMk1]

Maybe ..... Worth checking.