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Raven Head Samba Member
Joined: May 24, 2019 Posts: 12 Location: Florida
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Posted: Wed Apr 15, 2020 12:45 pm Post subject: Dual Master Cylinder and Brake Switch's |
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Hello,
So im switching over to a dual master cylinder setup and I was wondering if I need two brake light switches so the brake lights can work |
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Raven Head Samba Member
Joined: May 24, 2019 Posts: 12 Location: Florida
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Posted: Wed Apr 15, 2020 12:49 pm Post subject: Re: Dual Master Cylinder and Brake Switch's |
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thechief86 Samba Member
Joined: January 18, 2012 Posts: 860 Location: middle tn
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Posted: Wed Apr 15, 2020 12:56 pm Post subject: Re: Dual Master Cylinder and Brake Switch's |
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As long as it has pressure on the circuit that has the switch, the lights will work.
If one brake circuit fails, and loses pressure, a you'll at least have pressure on the front or back that didn't fail, and it may or may not turn on the brake lights, but at that point, you'll know you need repairs anyway, so you'd at least be able to get it home to fix it, at which point, you'd have brake lights again with a fully functioning brake system.
I have yet to upgrade my master cylinder on my 62, but this is the logic I plan to use regarding my own singular brake light switch, when I get around to it. _________________ "A poor workman always blames his parts... Ya gotta have skillz to hang junk." -johnnypan |
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Eric&Barb Samba Member
Joined: September 19, 2004 Posts: 24764 Location: Olympia Wash Rinse & Repeat
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Posted: Wed Apr 15, 2020 12:56 pm Post subject: Re: Dual Master Cylinder and Brake Switch's |
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You do not need both, but if one circuit fails you have a 50% chance of having working brake lights as you get it home. So better to just have both senders. _________________ In Stereo, Where Available! |
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VOLKSWAGNUT Fastest VW Belt Changer
Joined: October 14, 2007 Posts: 11056 Location: Flippin' a Belt........ .... Off-n-On ... NC USA
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Posted: Wed Apr 15, 2020 12:58 pm Post subject: Re: Dual Master Cylinder and Brake Switch's |
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Need.. no.. recommended yes..
Read up on the many topics about dual conversions.
https://www.thesamba.com/vw/forum/search.php?searc..._chars=200 _________________ aka Ken {o\!/o}
Its your vehicle- stop askin' for approval-do what YOU like for cryin' out loud
Better to roll em' how you want and wear em' out-than lettin' em' rot out
Its about the going not the showing
Rebuilt to drive not decorate
WANTED: Local Eatin' Joints, Triple D for TheSamba contributions here http://www.thesamba.com/vw/forum/viewtopic.php?t=570510
Search "VOLKSWAGNUT" on YouTube since you cant watch a "certain" BELT change video round here
Usually and often edited |
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Raven Head Samba Member
Joined: May 24, 2019 Posts: 12 Location: Florida
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Posted: Wed Apr 15, 2020 12:59 pm Post subject: Re: Dual Master Cylinder and Brake Switch's |
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Thanks just had to make sure just in case I need it |
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mukluk Samba Member
Joined: October 18, 2012 Posts: 7028 Location: Clyde, TX
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Posted: Wed Apr 15, 2020 1:03 pm Post subject: Re: Dual Master Cylinder and Brake Switch's |
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Regardless of whether or not you use both electrically for the lights to function, you'll still need two switches to fill the holes in the master cylinder. _________________ 1960 Ragtop w/Semaphores "Inga" |
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ladon67 Samba Member
Joined: December 23, 2018 Posts: 71 Location: North Kingstown, RI
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Raven Head Samba Member
Joined: May 24, 2019 Posts: 12 Location: Florida
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Posted: Wed Apr 15, 2020 1:53 pm Post subject: Re: Dual Master Cylinder and Brake Switch's |
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Yeah I'll figure somthing out about the other hole |
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runamoc Samba Member
Joined: June 19, 2006 Posts: 5601 Location: 37.5N 77.1W
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Posted: Thu Apr 16, 2020 5:42 am Post subject: Re: Dual Master Cylinder and Brake Switch's |
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IMO you will know when one of the brake circuits fails without an idiot light telling you it happened. That being said, use 2 two-prong brake light switches and connect them in parallel. Easier to connect which wire goes where than the three-prong brake light switches. Like mukluk posted, you're going to need two anyway. _________________ Daily driver: '69 Baja owned 44 yrs - Plan B: '81 Rabbit Diesel LS Deluxe - Plan C: '72 Ghia
Yard Art: 2 Sandrails
Outback: '69 Ghia - '68,'69,'70,'72 Beetle - '84 Scirocco, GTI - Pair of '02 Golfs-
VW Wiring = It's just wires |
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wayne1230cars Samba Member
Joined: April 05, 2010 Posts: 2685 Location: Canada
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Posted: Thu Apr 16, 2020 9:48 am Post subject: Re: Dual Master Cylinder and Brake Switch's |
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I did the single circuit to dual circuit m/c conversion on my ‘60 2 years ago. It’s a very worthwhile safety improvement. I bought the m/c and two switches from Wolfsburg West. Switches were $24 each which seemed like a lot but they have worked well with no leaks. There were reports of the lower priced ones leaking and not working after a few months. YMMV. _________________ 1960 beetle
1970 beetle convertible |
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mukluk Samba Member
Joined: October 18, 2012 Posts: 7028 Location: Clyde, TX
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Posted: Thu Apr 16, 2020 9:57 am Post subject: Re: Dual Master Cylinder and Brake Switch's |
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If you currently have a complete single circuit brake setup, you only need to buy one brake switch because you can reuse the existing one in your master cylinder. The switch thread size and pitch didn't change when they implemented dual circuit brakes. _________________ 1960 Ragtop w/Semaphores "Inga" |
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