Brake lights on continuously
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Road Captain
Joined: Nov 2007
Posts: 654
Likes: 11
Brake lights on continuously
Good day, Riders.
Looked for my previous post but can't seem to find it.
I ride a 2006 FLHTCUSE and it has developed this problem of the brake lights being on constantly.
Responses on the previous post suggested that the brake lever stop switch was the failing culprit. Unfortunately for me; that switch is putting out the right electrical conditions.
I've separated the connector under the seat that connects the front wiring harness to the back and the lights go out. So a short on the rear of the bike is ruled out.
Brake fluid reservoirs are full.
Any assistance, advice or direction would be greatly appreciated.
Thanks
Looked for my previous post but can't seem to find it.
I ride a 2006 FLHTCUSE and it has developed this problem of the brake lights being on constantly.
Responses on the previous post suggested that the brake lever stop switch was the failing culprit. Unfortunately for me; that switch is putting out the right electrical conditions.
I've separated the connector under the seat that connects the front wiring harness to the back and the lights go out. So a short on the rear of the bike is ruled out.
Brake fluid reservoirs are full.
Any assistance, advice or direction would be greatly appreciated.
Thanks
Club Member
Joined: Jun 2009
Posts: 5,323
Likes: 37
From: NJ
Let's go back to the front brake switch.
Did you change grips, install new housings or switches lately?
There is a small micro switch that your break lever keeps closed when the brake is at rest. This keeps your brake lite off.
If you have done any of the above mentioned work I'd bet that the housing has moved away from the c clamp just a bit.
Usually you just need to loosen the switch housing screws and force slide that housing back against the handlebar c clamp. This will properly position the front brake micro switch back where the front brake lever is depressing the micro switch when the brake lever is at rest thus shutting off the brake light.
Did you change grips, install new housings or switches lately?
There is a small micro switch that your break lever keeps closed when the brake is at rest. This keeps your brake lite off.
If you have done any of the above mentioned work I'd bet that the housing has moved away from the c clamp just a bit.
Usually you just need to loosen the switch housing screws and force slide that housing back against the handlebar c clamp. This will properly position the front brake micro switch back where the front brake lever is depressing the micro switch when the brake lever is at rest thus shutting off the brake light.
Cruiser
Joined: Dec 2011
Posts: 127
Likes: 3
From: London ON. Canada
Locate the rear switch and pull one the wires from the connector, making sure not to let it ground out. If the brakes are still on its the front switch. If brake light goes out and is activated by front switch its the rear.
Road Warrior
Joined: Sep 2011
Posts: 1,478
Likes: 64
From: West Liberty, Ohio
Let's go back to the front brake switch.
Did you change grips, install new housings or switches lately?
There is a small micro switch that your break lever keeps closed when the brake is at rest. This keeps your brake lite off.
If you have done any of the above mentioned work I'd bet that the housing has moved away from the c clamp just a bit.
Usually you just need to loosen the switch housing screws and force slide that housing back against the handlebar c clamp. This will properly position the front brake micro switch back where the front brake lever is depressing the micro switch when the brake lever is at rest thus shutting off the brake light.
Did you change grips, install new housings or switches lately?
There is a small micro switch that your break lever keeps closed when the brake is at rest. This keeps your brake lite off.
If you have done any of the above mentioned work I'd bet that the housing has moved away from the c clamp just a bit.
Usually you just need to loosen the switch housing screws and force slide that housing back against the handlebar c clamp. This will properly position the front brake micro switch back where the front brake lever is depressing the micro switch when the brake lever is at rest thus shutting off the brake light.
Club Member
Joined: Sep 2010
Posts: 15,425
Likes: 7,120
From: Beyond Fucital
If not, try pushing in on the front brake switch, you may have a broken switch cap.
Outstanding HDF Member
Joined: Mar 2009
Posts: 2,216
Likes: 102
From: Central Illinois
I also just had this problem occur last weekend. Or at least it became a problem then, was no doubt starting well before. Turned out that the front brake lever would not return all the way on its own, leaving the brake light switch engaged. I rebuilt the front master cylinder and flushed the brake fluid and put in new and bled the system. Now the lever returns like a champ and the whole system works even better. These brakes should be flushed with new fluid about every 2 years, since they tend to sit a lot over the winter and moisture gets in them. The o rings and seals end up swelling or getting contaminated with corrosion causing the master cylinder piston to not return properly.
Last edited by Guntoter; Sep 27, 2013 at 10:00 PM.
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Outstanding HDF Member
Joined: Jul 2010
Posts: 2,187
Likes: 11
From: Ladera Ranch, CA
Same deal happened to me. I broke the nub off the front brake light switch while changing bars.....$16.00 later, I was on the road. 
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