My scooter's stop lights have stopped working when I apply brakes, however tail light still works. I checked for a loose connection but all seems ok. It's a Honda activa

2 Answers 2


Check the following:

  1. the bulb: it has two filaments one can work while the other has failed

  2. supply to the switch: if no supply check the fuse.

  3. check the switch goes live on the output when the brake is operated.

  4. does the socket get a supply when the brake is operated - if no and you have checked the switch then there is a break in the wire to be found.

  • Agreed- My first suspect would always be the bulb!
    – Nick C
    Commented Jan 7, 2018 at 19:29
  • 1
    As an electrician I started to notice the fault was often the other end from where you started... but the bulb is normally the easiest to get to and check.
    – Solar Mike
    Commented Jan 7, 2018 at 19:30
  • @Solar Mike I shall check and update you
    – DhKo
    Commented Jan 7, 2018 at 20:11
  • As a #5 I'd check for corrosion in the socket which could be blocking contact to the brake light pin on the bulb.
    – GdD
    Commented Jan 8, 2018 at 9:38
  • Bulb is all ok.checked for fuse and supply also only thing remaining is the faulty switch but I am not able to locate that.Any idea where it could be located and how it looks?
    – DhKo
    Commented Jan 8, 2018 at 9:39

Check the combi break, may be the cables are wrong fixed, check the combi break unit. Same issues happed to me.

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