Printable Version of Topic

Click here to view this topic in its original format

914World.com _ 914World Garage _ 914Rubber Master Cylinder

Posted by: DucRS Jan 24 2020, 02:54 PM

Hello guys
I just installed the new 914Rubber Brake Master Cylinder and once installed I found only ONE electrical connection on the Master but my 1973 2.0 has TWO wires that connect to the old Master. Both wires are brown except one has a white streak. What’s your advice?
TIA!
Attached Image

Posted by: lierofox Jan 24 2020, 03:01 PM

I believe for the single terminal switches, the wire to plug in is the "Brown with White stripe" wire.

Posted by: jcd914 Jan 24 2020, 03:04 PM

QUOTE(lierofox @ Jan 24 2020, 01:01 PM)

I believe for the single terminal switches, the wire to plug in is the "Brown with White stripe" wire.

The other wire is a ground wire and the new switch with a single connector grounds through the switch body to the master cylinder body.

A while back there was someone selling NOS brake warning switches in the classified section.

Jim

Posted by: Mark Henry Jan 24 2020, 03:05 PM

Didn't notice this on the 914 rubber MC I got for a spare, but mine also has one connection. Likely you can just ground the brown wire or if your original switch is good just swap them.

Posted by: lierofox Jan 24 2020, 03:11 PM

QUOTE(Mark Henry @ Jan 24 2020, 01:05 PM)

Didn't notice this on the 914 rubber MC I got for a spare, but mine also has one connection. Likely you can just ground the brown wire or if your original switch is good just swap them.

I'd say tape it off and stow it. Shouldn't need the brown wire with the new switch, but, doesn't hurt to leave it there, just unplugged.

Posted by: DucRS Jan 24 2020, 03:13 PM

OK, gonna connect the Brown/White stripe wire and disregard the solid Brown for now. I tossed the old Master so can’t use the old one.. SMH.
Thanks guys

Posted by: DucRS Jan 24 2020, 03:17 PM

Oh, side note. This is the last of my “to do list” before I attempt to fire her up after 28 years... todayI will crank her over for the first time.

Posted by: Mark Henry Jan 24 2020, 03:26 PM

QUOTE(DucRS @ Jan 24 2020, 04:17 PM)

Oh, side note. This is the last of my “to do list” before I attempt to fire her up after 28 years... todayI will crank her over for the first time.

Posted by: Mikey914 Jan 24 2020, 03:41 PM

Thanks for responding guys,
Yes the only ones we could get without making new ones were the 2pole version. So no you don't need the ground side.

Do bleed the brakes thoroughly, this may require a few attempts as this system is hard to get the bubbles out.

Posted by: roblav1 Jan 24 2020, 06:06 PM

I just did this today and swapped out the switches. Old switch went in new MC.

Posted by: StarBear Jan 24 2020, 06:17 PM

Crossing fingers for your successful fire up. Long time....