 19mm master cylinder question, one wire |
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| whitey |
 May 12 2008, 01:50 AM
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#1
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Member  Group: Members Posts: 146 Joined: 8-February 07 From: Coto de Caza Member No.: 7,508  |
My new 19mm MC has only one wire connection for the break light...which of the two wires from my wiring harness do I connect?
Thanks, Dave |
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Replies(1 - 4)
| Dr. Roger |
May 12 2008, 02:32 AM
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#2
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A bat out of hell. Group: Members Posts: 3,944 Joined: 31-January 05 From: Hercules, California Member No.: 3,533 Region Association: Northern California |
on a '74, it's referred to as F6, the brake warning switch wire.
brown with a yellow stripe. seen here. http://www.pelicanparts.com/914/parts/Elec...lectric_74C.jpg |
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| 914Sixer |
May 12 2008, 06:50 AM
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#3
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914 Guru Group: Members Posts: 8,897 Joined: 17-January 05 From: San Angelo Texas Member No.: 3,457 Region Association: Southwest Region 
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Both wires. You need to take the switch off your old master cylinder. Cars up to 74 have a ballast connected on the hand brake behind the dash. If you need a new one I have 2 left. I believe they are no longer available. $30 shippped Priority Mail.
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| jasons |
May 12 2008, 09:07 AM
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#4
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Jackstand Extraordinaire Group: Members Posts: 2,002 Joined: 19-August 04 From: Scottsdale, AZ Member No.: 2,573 Region Association: None |
I don't think you necessarily have to use the old switch. The BROWN wire is just a ground lead. The 19mm switch grounds through the M/C to the chassis.
At least thats what I see on the 73 electrical schematic. |
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| Dave_Darling |
May 12 2008, 09:26 AM
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#5
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914 Idiot Group: Members Posts: 14,991 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California
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Exactly--just plug the brn/yel wire in, and tape the brn wire out of the way.
--DD |
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