1969 Master Cylinder Wiring

[dolppl]

I hope I am doing this right. First post.

I am rewiring my '69 Beetle and everything I am finding is showing the Master Cylinder as having 2 ports with 3 wires going to each. My master cylinder has 3 different ports with 2 wires going to each. See picture if I attached it properly. My wiring bundle I am using (from JBugs) has 3 bundles. 2 with a black and a black and red wire and 1 with a blue and red. The diagram shows the black and black and red wires going to each side and the blue going to one side and the red to the other. Not sure how to wire it up when it is split into 3.

Any help is appreciated

[dolppl]

nevermind I found a video showing the correct wiring.

[mclumber1]

Out of curiosity, is your master cylinder stock? I don't remember my 69 having 3 spots to hook up wires, and my 68 only has 2.
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1968 Beetle

[ashman40]

That's the early style dual-piston MC used from '67-'69. It had three switches.
For wiring, reference the following wiring diagram:

You can see the two (2) MC switches (J3) and the brake warning switch (J6) just below the left headlight.

The main difference with the above diagram and the earlier '68-'69 wiring diagram is the flasher relay (J or J1) and E-Flasher switch (G1). Early relay was 7 or 9-prong. Later relay was 4-prong.
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AshMan40
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'67 Beetle #1 {project car that never made it to the road }
'75 Beetle 1200LS (RHD Japan model) {junked due to frame rot}
'67 Beetle #2 {2019 project car - Wish me luck!}

[ashman40]

[Cusser]

Obviously your inlet hoses are leaky, and maybe not the correct kind for brake fluid. Hopefully, that's the only reason the master cylinder is crud from leakage.
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1970 VW (owned since 1972) and 1971 VW Convertible (owned since 1976), second owner of each. The '71 now has the 1835 engine, swapped from the '70. Second owner of each. 1988 Mazda B2200 truck, 1998 Frontier, 2014 Yukon, 2004 Frontier King Cab. All manual transmission except for the Yukon. http://www.thesamba.com/vw/forum/album_page.php?pic_id=335294 http://www.thesamba.com/vw/forum/album_page.php?pic_id=335297

[dolppl]

So turns out the wiring diagram/video i found out was also slightly different than mine. The one i found had the 3rd switch at the very end of the MC in line with it not perpendicular like the other 2.

Am I safe to assume for this unit the brake warning switch (J6) in that diagram is the middle switch and should be wired as such?

Side note - Picture was taken before i cleaned the MC up the picture made it look worse than it really is.

[johneliot]

Yes, you are correct on the middle switch.
_________________
John

There is no distinctly American criminal class - except Congress.
Mark Twain

69 bug - "The Grey Ghost"

[dolppl]

Excellent.

Next question: The wire going from the transmission reverse light switch that goes to the coil, the diagram i have shows an inline fuse holder. (Looks like S1 in the diagram a few posts before this one). Which inline fuse holder do i use and what fuse do i put in it. Not familiar with that and it didn't come with my kit.

Thanks

[jetmech]

the inline fuse to use would be a glass style fuse about a 5 amp would work its just needed for the backup lights. So it would go from the + side of the coil through the fuse to the trans switch then to the backup lights.
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74' Super Beetle

[ashman40]