Rear brake light switch
Thread Starter
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Tourer
Joined: Oct 2009
Posts: 471
Likes: 19
From: Grapeland Texas
Rear brake light switch
Last night I noticed my brake lights were on while riding. Don't know how long it been doing it. Thought it might be the module that makes the rear turn signals into running lights and brake light but when I took it off same problem. So I pulled one wire off the rear brake switch and it goes out. Hit the front brakes light works fine. My question is, is this something common. Could there be something causing this or has the switch just gone bad. I mean the bike is an '08 so it's not that old. Good thing is I can still ride because I always use my front brakes also.
Thread Starter
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Tourer
Joined: Oct 2009
Posts: 471
Likes: 19
From: Grapeland Texas
I will replace the switch. I don't think the wires are damaged because the light goes off when I disconnected it from the switch. I'm sure the switch just went bad but I don't see how it could,but it's mechanical so anything could go wrong. Good thing is it doesn't look that hard to replace, but I'm a long ways from the nearest Harley place.
Ultimate HDF Member
Joined: May 2010
Posts: 7,882
Likes: 5
From: So California
You'll need to drain the rear brake fluid and refill/bleed the brake once you've replaced the switch.
I used teflon pipe dope I got at Home Depot on the switch threads when I replaced the stock brake line with a stainless one.
I used teflon pipe dope I got at Home Depot on the switch threads when I replaced the stock brake line with a stainless one.
Tourer
Joined: Jun 2009
Posts: 328
Likes: 0
From: AZ
My rear brake pressure switch quit working in the on mode too. This caused so much heat it fried the bulb and bulb socket as well. I was able to buy and replace the socket/connector and bulb so I had front brake actavation. The pressure switch I discovered was a new banjo type (#72026-08) and was back ordered for several months. They just became available last week. To install I drained the fluid, installed the fitting along with two seal washers (#41731-01) using a bit of locktite blue and blead the line. All is well again. No one was willing to tell me how frequently this happens.
Last edited by trekez2; Sep 12, 2011 at 09:38 AM.
Road Master
Joined: Apr 2009
Posts: 1,123
Likes: 43
From: NJ
Happens quite a bit, that same switch is used in a number of applications, some dateing back to my VW bug in the 60's... you don't have to drain any brake fluid and if you are quick about it you won't have to do much if any bleeding of the line but I always do just to be thurough.
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Joined: Jan 2009
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From: Los Angeles, CA
Happens quite a bit, that same switch is used in a number of applications, some dateing back to my VW bug in the 60's... you don't have to drain any brake fluid and if you are quick about it you won't have to do much if any bleeding of the line but I always do just to be thurough.
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