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Old 04-08-2019, 11:01 AM   #1 (permalink)
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Join Date: Sep 2009
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Rear Brake Light Switch Issues

Hey Guys- Been a long winter with lots of nasty mag-chloride on the roads, but given me a chance to wrench on the 2000 Softail Heritage. Custom painted tins installed, rebuilt wire wheels, new exhaust installed, cam tensioner inspection, all fluid change, rebuilt both brake calipers. The rear caliper was dragging on one side and when I popped out the pistons, I found aluminum milling debris inside one of the passages! Presumably from manufacture. Blead the system, now the brake switch works only with a very hard press on the peddle. Front works like a charm. Could I have a bubble of air in the switch causing it to work only when pushed very hard? I know these switches are troublesome, but it was working fine before.
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Old 04-08-2019, 01:02 PM   #2 (permalink)
IronButt
 
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tall terry is still riding a stock bike tall terry is still riding a stock bike
if you left the caliper in place while bleeding,, I would suggest that you still have air in the rear system...

step back and have a look at where the bleeder is,,, and where the MC is,,, the MC port is lower than the bleeder,, and the bleeder is not the highest point on the caliper,,, so.... you need to address all this and re bleed it..

try this,,, remove the caliper,,, leave the pads in,,, put a lock between the pads,,, then lower the caliper to the ground,, or lower than the mc,, then open the bleeder,,, pull and hold the lever,,, and close the bleeder,,, continue until all air is removed... be sure to hold the bleeder to the highest point...
then reinstall,, and pump the lever,,, slowly until the pads contact the rotor and lever travel is at a minimum,, 5hen check the light,,, check the front switch as well,,,, the front is an electric switch ther rear is a pressure operated hydraulic,, with 2 wires at the top of the switch..

Last edited by tall terry; 04-08-2019 at 03:07 PM.
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Old 04-08-2019, 10:12 PM   #3 (permalink)
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Quote:
Originally Posted by tall terry View Post
if you left the caliper in place while bleeding,, I would suggest that you still have air in the rear system...

step back and have a look at where the bleeder is,,, and where the MC is,,, the MC port is lower than the bleeder,, and the bleeder is not the highest point on the caliper,,, so.... you need to address all this and re bleed it..
Good point. After a lot of bleeding, l finally did get the peddle pretty hard. Iíll give this a try and re-bleed lower than the MC and hopefully this will fix the issue.
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Old 04-10-2019, 10:12 AM   #4 (permalink)
IronButt
 
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tall terry is still riding a stock bike tall terry is still riding a stock bike
let us know how it works out,, ok?
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Old 04-14-2019, 10:39 PM   #5 (permalink)
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slowlane wants to know Dino or Syn?
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Originally Posted by tall terry View Post
let us know how it works out,, ok?
Will do. I may not get to it for a week or so. More snow here and lím getting tired of it, so headed to AZ.
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