Brake Master Cylinder

[newkitman]

Question for all the VW based TDr folks. Which brake master cylinder do you use and how is yours wired? I have a dual brake master cylinder and have both brake switches installed but am only using one brake switch. I see no real need for using the other brake switch other than plugging the master cylinder. I don’t have the warning light and don’t think many TDrs have them. Nothing really important but just curious. Thanks.

Allen Caron
VW based 53MGTD - "MoneyPenny"
"If one thing matters, everything matters" - from the book The Shack

[Paul Mossberg]

VW master cylinder; with only the brake light switch wired.

Paul Mossberg
Former Owner of a 1981 Classic Roadsters Ltd. Duchess (VW)
2005 Intermeccanica Roadster

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[newkitman]

At this point in time I’m only using one brake light switch.

Allen Caron
VW based 53MGTD - "MoneyPenny"
"If one thing matters, everything matters" - from the book The Shack

[Bob]

I think mine is the standard circa 1970 type with both switches, but I think only the forward one is connected/functional. Thought I had a picture of it from when I was trying to find out why I lost brake lights (loose switch connections), couldn’t locate that to be sure about the wiring.

[edward ericson]

I consider the second one a spare. If the one you’re using ever fails, clean the terminals and plug in the other one.

[newkitman]

While connecting the MC brake switch wiring, I found the MC leaking at the top front fitting from the reservoir. The rubber plug that the tube fits through appeared to be the culprit and it was. Just wasn’t pushed in enough. With that fixed, tomorrow I’ll rebelled the brakes. Getting closer.

Allen Caron
VW based 53MGTD - "MoneyPenny"
"If one thing matters, everything matters" - from the book The Shack

[Gregg Strain]

Probably too late with this, but the suns still shining!  Just finished re-wiring and seriously upgrading my FF TD.  I have the duel master cylinder also, but I wired both switches in parallel so either would activate the lights. Consider this; if you wired just the rear switch and the rear brakes failed, you may not not notice the decreased performance as the front brakes provide most of the stopping power. Now your brake lights won’t be between you and the cell phone user behind you! I’m so paranoid that I use hand signals also if somebody is too close. Since nobody understands them, they draw attention – which is good!

[secretagentcat]

Great subject Im getting ready to change my MC also. I like the idea of having a spare….

[Author]

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