LCGB Forums

I've just about finished rebuilding my scoot after a complete strip down and respray.
I started it up for the first time on Tuesday night and after a couple of kicks it started fine. Bit of a problem with the throttle but thats another story. Anyway, i checked all the lights were working but the rear brake light is permanently on. I'm presuming its a problem with the switch as all the wiring went back the same way it came out. Any ideas?

worth checking that the two bullet connector wires that plug into the rear light fitting are the right way round or your brake light bulb will be dimmer than your rear light.
Check that the brake switch is cutting the power fron the pedal switch to the rear light .Power to the brake light switch is constant whilst the engine is running. The brake switch works by connecting the power to the brake light bulb when the brake pedal is pressed ie when the switch push button is released. Its a press-to-break switch

Hi scooterstu
You will get this if the brake pedal is not fitted.the brake pedal keeps the switch plunger in at normal. The plunger comes out when you press the pedal
Grandpa

good point grandpa. Without the brake lever fitted the switch plunger would be out, in the ' Make a connection' position which is the opposite of almost every other switch

Thanks guys, brake pedal is fitted and presses the switch back in. I'll check the wires and try switching them over

pink wire is the live feed to the brake light bulb.
Black wire is the live feed to the rear running light
Earth for both bulbs is via the rear light housing to the frame.
If you have a multimeter you should be able to check the switch is working properly.
Unplug both wires to the rear light . Set the Multimeter to continuity. Connect the black (earth) probe to the chassis somewhere and putting the red live probe on the end of the pink wire that connects to the rear light fitting . Start the scoot and there should be zero voltage at the end of the pink wire .

If there is a voltage you'll need to track the pink wire from the rear light to the brake switch and check its not shorted anywhere . Next check the switch is positioned and working properly. If you still have a voltage on the pink wire without the brake pedal depressed then you must have a faulty switch