LED TAIL LIGHT/brake light...
I asked before and ask again: Have you checked with a multimeter or a probe light if you have 12v power at the stoplight wire at the switches and the rear light circuit board when you apply the brake(s)?
I guess red is for stoplight, yellow for runninglight and black for ground.
I guess red is for stoplight, yellow for runninglight and black for ground.
I asked before and ask again: Have you checked with a multimeter or a probe light if you have 12v power at the stoplight wire at the switches and the rear light circuit board when you apply the brake(s)?
I guess red is for stoplight, yellow for runninglight and black for ground.
I guess red is for stoplight, yellow for runninglight and black for ground.
Last edited by slowboy; Mar 20, 2026 at 05:32 PM.
I unplugged the 2 wires from the brake light switch. With my probe light, I turned ignition switch on and with both wires removed from brake light switch 'both' wires showed power to them. I thought that the brake light wire should only show power when brake pedal or front lever was pressed. Am I wrong or is there something wrong with the wiring? Plus now the front right turn signal light doesn't work
1. unplug the O/W wire from your stoplight switch
2. Connect probe light clamp to ground at frame
3. Turn ignition on
4. Check with tip of probe light if you have power at the O/W wire. If you have no power check if you have power at the the acc fuse outlet where the O/W wire is connected
5. If you have power at the O/W wire at the stoplight switch unplug the R/Y wire at the switch, apply the brakes and check if you have power at the stud where the R/Y wire was connected. If you have no power you have a bad brake switch. If you have power, reconnect the R/Y wire, apply the brakes and check the R/Y wire at the rear light connector for power. If you have no power, check for a broken R/Y wire. If you do have power the led module went out of order.
Last edited by FXD2003Rider; Mar 22, 2026 at 02:41 PM.
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