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tmmybrbr Samba Member
Joined: February 28, 2017 Posts: 31 Location: ocean city, nj
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Posted: Sun Jul 25, 2021 5:28 am Post subject: BLM. Brake lights matter |
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Ok, had my bus at the mech last week bc the oil cooler was leaking crazy oil. Thankfully it was just the seals.
Mech also adjusted the brakes while it was there, pedal is much higher and firm now.
This week I realize that my brake lights are constantly on from once the key goes to ON. Not sure if it was like that since pickup.
No change if I turn on headlights or depress the brake pedal.
If I switch the left/right wiring on the taillight assemblies, the brake lights are still on, but then when I turn on the headlights the taillight gets brighter, making me think that my constant ON state is actually just running lights and my brake lights aren’t coming on at all.
Suggestions? Could the mech’s adjustment be compressing the brake cylinder enough that even with no pressure on the pedal that the light comes on? _________________ 74 Brazilian 15w
60 Kombi 11w - sold |
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crukab Samba Chef
Joined: December 13, 2002 Posts: 6115 Location: Vermont
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Posted: Sun Jul 25, 2021 6:38 am Post subject: Re: BLM. Brake lights matter |
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tmmybrbr wrote: |
Could the mech’s adjustment be compressing the brake cylinder enough that even with no pressure on the pedal that the light comes on? |
I'd say Yes, same thing happened w/ my '66, I adjusted the linkage @ the pedal
too much and the Brake lights stayed on , I just backed the adjuster off a bit. _________________ Tom
My Pops:
http://www.thesamba.com/vw/forum/viewtopic.php?t=604100&highlight=
I know you will always be with me, rest in peace with no more pain. 8/13/14.....
In the yard right now:
'51 Dodge 5 window truck
'65 Bug
'66 Singlecab
'82 Rabbit Truck Diesel from CALI
'86 Doublecab W/T
'91 Vanagon carat/wolfsbrg.Tiico
'88 Dodge Ram pickup
'11 Jetta Wagon |
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Eric&Barb Samba Member
Joined: September 19, 2004 Posts: 24671 Location: Olympia Wash Rinse & Repeat
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Posted: Sun Jul 25, 2021 5:31 pm Post subject: Re: BLM. Brake lights matter |
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While info just below is for beetle, the info on the gap is the same:
and:
_________________ In Stereo, Where Available! |
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tmmybrbr Samba Member
Joined: February 28, 2017 Posts: 31 Location: ocean city, nj
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Posted: Sun Jul 25, 2021 6:58 pm Post subject: Re: BLM. Brake lights matter |
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I read the dummies guide about how to adjust the push rod, and just tried it. No luck, unless it’s waaay in further than it needs to be, which might be the case if that graphic is accurate on the number of threads exposed on the push rod when properly adjusted. _________________ 74 Brazilian 15w
60 Kombi 11w - sold |
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tmmybrbr Samba Member
Joined: February 28, 2017 Posts: 31 Location: ocean city, nj
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Posted: Mon Jul 26, 2021 1:22 pm Post subject: Re: BLM. Brake lights matter |
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I don't think it's the push rod.
rather than move it much farther, I tried unbolting the master cylinder and gently moving it away from the push rod. I moved it nearly ½" and still the brake lights were stuck on.
If I pull the either wire off the cylinder sensor, the lights go off. Bad sensor? _________________ 74 Brazilian 15w
60 Kombi 11w - sold |
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Eric&Barb Samba Member
Joined: September 19, 2004 Posts: 24671 Location: Olympia Wash Rinse & Repeat
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Posted: Mon Jul 26, 2021 1:37 pm Post subject: Re: BLM. Brake lights matter |
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tmmybrbr wrote: |
If I pull the either wire off the cylinder sensor, the lights go off. Bad sensor? |
More than likely. Either that or the wiring needs a major redo/organizing. _________________ In Stereo, Where Available! |
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johny__utah Samba Member
Joined: September 02, 2008 Posts: 426 Location: Arizona/California
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Posted: Mon Jul 26, 2021 2:07 pm Post subject: Re: BLM. Brake lights matter |
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check the connection on the fuse box. #2 red/black wire and or replace the sensor. It might have gone bad/plugged with all the brake pumping when adjusting. I would ask if he adjusted the push rod before i messed with it, not sure why he would. _________________ 1956 L31
1961 L346 L347
1963 L380 L289 |
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tmmybrbr Samba Member
Joined: February 28, 2017 Posts: 31 Location: ocean city, nj
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Posted: Tue Jul 27, 2021 4:36 am Post subject: Re: BLM. Brake lights matter |
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It was the switch.
I pullled it off, checked with my meter, it was open.
Called a local VW shop and got a new one, installed it and back in business.
Thanks for the help and advice! _________________ 74 Brazilian 15w
60 Kombi 11w - sold |
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ToolBox Samba Member
Joined: January 27, 2004 Posts: 3439 Location: Detroit, where they don't jack parts off my ride in the parking lot of the 7-11
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Posted: Tue Jul 27, 2021 8:27 am Post subject: Re: BLM. Brake lights matter |
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tmmybrbr wrote: |
I pullled it off, checked with my meter, it was open.
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Do you mean closed? If it was open the brake lights would be off.
Also pay no attention to the how many threads should be showing on the pushrod part of the freeplay instructions. This assumes a factory spec part is used and there are several different masters used over the years and basically 2 offered in the current market, Just make sure the freeplay is at 1mm at the rod to piston interface. |
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tmmybrbr Samba Member
Joined: February 28, 2017 Posts: 31 Location: ocean city, nj
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Posted: Fri Jul 30, 2021 12:39 pm Post subject: Re: BLM. Brake lights matter |
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ToolBox wrote: |
tmmybrbr wrote: |
I pullled it off, checked with my meter, it was open.
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Do you mean closed? If it was open the brake lights would be off.
Also pay no attention to the how many threads should be showing on the pushrod part of the freeplay instructions. This assumes a factory spec part is used and there are several different masters used over the years and basically 2 offered in the current market, Just make sure the freeplay is at 1mm at the rod to piston interface. |
haha yes, meant the switch was closed. _________________ 74 Brazilian 15w
60 Kombi 11w - sold |
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