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Join Date: Jul 2018
Posts: 23
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Master cylinder switch
Hi
After upgrading my master cylinder, I noticed the connection from the MC only have one prong and there 2 connections from the wire.. Did I put in a wrong switch? What is my option? I don't want to spend on new switch. Thanks Bob 
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05-06-2021, 02:34 PM
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That's the same as mine. One of those two wires is sufficient - trial and error or look for witness mark on the connector.
Ignore the crusty underside:  Karl |
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05-07-2021, 08:14 AM
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Thank you Karl,
so just connect one wire and ignore the other. Just to sure, what is the "witness mark" on the connector? |
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05-07-2021, 02:18 PM
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Witness mark- the connector/female plug that has scratches or an imprint of the male plug as evidence of it being attached previously.
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05-07-2021, 02:33 PM
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got it, so I would look for a mark indicating used on a male terminal from the switch previously..
Hopefully only one will show the mark and not both...but there a chance that both will show the mark say ...if both were used previously on a 2 prongs switch. I just have to check and see. Thanks again |
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05-07-2021, 02:47 PM
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What they said... There are 2 wire switches and single wire switches. You may have to trial and error it... 50/50 shot at getting it right first try.
Karl |
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05-08-2021, 02:07 PM
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Karl,
Just curious, what is the switch on the MC for? It's not for the back up light.. I don't think. Could it be an indicator light for one of the instrument gauge? |
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05-09-2021, 08:32 AM
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Join Date: Dec 2006
Location: Northern VA
Posts: 585
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Bentley pg 470-9 > indicates it is the stop light switch
kgl
__________________
Kim Langley 2012 Carrera / 991.1 80 911SC 97 C230 73 BMW 2002Tii |
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05-09-2021, 04:29 PM
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911E
