Hello everybody. I would like to know how the brake light switch on the R4 is supposed to work. I am referring to the one on the end of the brake master cylinder. I have found that if I jump power to one side the lights turn on. Is this normal? How is it supposed to work? Thanks in advance.
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Brake light problem
- Thread starter R4Lesotho
- Start date
Steve Hennessey
Moderator
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- 1,406
If you touch both wires together and the brake lights come on then it points to the switch not working. Somebody else had the same problem not that long ago so if you do a search you may find some answers. However, it is worth removing the switch and you may see lots of muck in the passage. If you carefully clean this out with a needle and then use compressed air to remove all traces of the muck it is possible that the switch may work again.
If there is muck in the system then it's worth bleeding all the brakes and replenishing the fluid.
If there is muck in the system then it's worth bleeding all the brakes and replenishing the fluid.
Steve Hennessey
Moderator
- Messages
- 1,406
Right - take both wires off the switch. Turn the ignition on and touch the two wires together. If the lights go on then it's a switch related problem. One of the wires should be live and the other neutral.