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Tars
Samba Member
Joined: May 09, 2015
Posts: 15
Location: Sunshine Coast
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 Posted: Thu Jul 30, 2015 5:51 pm Post subject: Brake lights stay on |
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This is driving me crazy. Noticed last night, while outside of the CA at, engine off, keys out, that the brake lights are on. I replaced one of the brake light switch just two days ago (it was leaking). I installed another replacement today, thinking it must be a dodgy switch, but the lights remain on.
I just dismantled the ground cluster behind the fuse relay panel, and cleaned all the grounds. I have replaced all of the fuses, and cleaned the fuse terminals.
Does anyone have any ideas?
EDIT: 1982 VANAGON TYPE IV |
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crazyvwvanman
Samba Member
Joined: January 28, 2008
Posts: 9923
Location: Orbiting San Diego
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| Posted: Thu Jul 30, 2015 7:27 pm Post subject: Re: Brake lights stay on |
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I would unplug the harness from each of the switches and see if the brake lights turn off.
Mark
| Tars wrote: |
.......
Does anyone have any ideas?
EDIT: 1982 VANAGON TYPE IV |
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OLD VW NUT
Samba Member
Joined: February 23, 2011
Posts: 2776
Location: High Desert of Washington 98823
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| Posted: Thu Jul 30, 2015 7:42 pm Post subject: |
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Did you bleed the brake system after replacing the switches? You might have air in the system. As it warms air expands and can cause minimal drag on the brakes or lock them up in severe cases.
The master cylinder piston may not be returning to its resting spot which would leave a slight bit of pressure in the lines. If those new switches are more sensitive than the old ones that slight pressure might be just enough to allow them to complete the circuit and the brake lights come on and stay on. Try releasing one of the bleeder valves and see if they come off. You'll need to relieve both sides since you have a dual master cylinder. Front right and back left are on one circuit and front left back right are connected on the other side. If that does the trick you need to figure out whether it is air in the lines or as I noted above - the master's piston isn't returning to its normal resting position where the return port is able to relieve the internal pressure. If you haven't removed the master then air is the most likely suspect. It only takes a small bubble to screw things up!
_________________
71 Ghia Coupe - stock body - no rust! Powered by a 2110 W/Dual HPMX 44's - Rancho Pro Street Transaxle - A/C by Gilmore
Other car - 2013 VW Golf TDI |
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goffoz
Samba Member
Joined: May 09, 2007
Posts: 1486
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| Posted: Thu Jul 30, 2015 8:52 pm Post subject: |
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| LED's or regular bulbs? |
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