Front Brake Light Switch
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Seasoned HDF Member
Joined: Feb 2012
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From: Sunshine State
Front Brake Light Switch
Brake lights staying on, or coming on in a sporadic manner? I read quite a few of posts in regards to this and thought I'd share. First thought is it's the switch only to find that the switch works just fine. Pull it apart and look at the master cylinder's plunger shaft and see if it butts up to the brake lever. Chances are it's not fully extending, a lil lube on it and work the lever/plunger until it butts back up.
Don't forget the 3/32" spacer at the lever as to not damage the brake switch when reinstalling and pay attention to your torques on the housing screws for the brake light switch adjustment.
Last week I posted in regards to the ABS brake line junction block bolt needing a thin layer of silicone caliper grease so the junction block retains that small movement. I'm still to find that in the manual as part of maintenance.
Yep, into a full detail, maintenance schedule, on my Deluxe. Hope these lil tips help someone out.
Don't forget the 3/32" spacer at the lever as to not damage the brake switch when reinstalling and pay attention to your torques on the housing screws for the brake light switch adjustment.
Last week I posted in regards to the ABS brake line junction block bolt needing a thin layer of silicone caliper grease so the junction block retains that small movement. I'm still to find that in the manual as part of maintenance.
Yep, into a full detail, maintenance schedule, on my Deluxe. Hope these lil tips help someone out.
Last edited by Tampa Fatboy; Aug 3, 2016 at 03:45 PM.
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Joined: Feb 2016
Posts: 88
Likes: 3
From: newfoundland
Nice tip - had the same problem with my Blackline . Funny you mentioned the master cyl cover , now that I think problem only appeared after i had checked fluid - maybe I have to re check the cover bolts too .
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Seasoned HDF Member
Joined: Feb 2012
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Likes: 10,452
From: Sunshine State
I didn't mention anything about the master cylinder cover, it has nothing to do with the brake light adjustment. I did refer to the switch housing alignment and torque values. Behind the brake lever, master cylinder side, you'll find a shaft protruding from the master cylinder butting up against the brake lever. Sometime that shaft doesn't release and needs a lil machine oil on it and worked until fully extends and butts up to the brake lever. Hope that clarifies my input somewhat. Good luck.
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Joined: Feb 2016
Posts: 88
Likes: 3
From: newfoundland
I didn't mention anything about the master cylinder cover, it has nothing to do with the brake light adjustment. I did refer to the switch housing alignment and torque values. Behind the brake lever, master cylinder side, you'll find a shaft protruding from the master cylinder butting up against the brake lever. Sometime that shaft doesn't release and needs a lil machine oil on it and worked until fully extends and butts up to the brake lever. Hope that clarifies my input somewhat. Good luck.
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