Brake pressure switch leaking....HELP
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Instructor
Joined: Jul 1999
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From: Cumming, GA
Brake pressure switch leaking....HELP
I noticed the brake pressure switch was leaking or at least I thought it was. I replaced it and I still have the leak. Upon further inspection I see the connector, (its special) is really what's leaking. The wire leading to it is no longer sealed to the connector as I believe it should be. Bottom line I need a new connector pigtail. My local Chevy dealer told it is a part of the engine harness. So I'm faced with spending 200 or 300 dollars to get a $7.00 dollar connector. By the way this is the small white switch that screws into the bottom of the master cylinder. CAN ANYONE OUT THERE HELP!!!!!!!
Melting Slicks
Joined: Nov 2000
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From: X
Re: Brake pressure switch leaking....HELP (Rich Shriver)
How can a wire leak? It has to be the master cylinder or the switch that leaks. The switch is sealed at the top and plugs into the connector. Sure it isn't a bad connector or cross threaded?
Thread Starter
Instructor
Joined: Jul 1999
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From: Cumming, GA
Re: Brake pressure switch leaking....HELP (Rich Shriver)
Thanks for the reply JonM. When I said the wire was not sealed to the connector I should have said the wire insulation jacket should be molded as a part of the connector so that it is in effect sealed into the bottom of the connector. I have checked for other sources of the leak very carefully and believe it's the connector.
Melting Slicks
Joined: Nov 2000
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From: X
Re: Brake pressure switch leaking....HELP (Rich Shriver)
Rich...I have one of those switches sitting in front of me. I changed mine last week along with my MC. 84-94 uses the same switch. The only thing that could be leaking is the switch itself. If you unplug the switch it would not leak where the connector fits. You have to have a bad connector, its not seated all the way in or its crossthreaded. Is this what yours looks like? That nipple on the end is supposed to fit in the hole in the threaded hole and shut off all fluid. Maybe you have some dirt holding it open.
Thread Starter
Instructor
Joined: Jul 1999
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From: Cumming, GA
Re: Brake pressure switch leaking....HELP (Rich Shriver)
Hey Jon... Thanks for your input. Are the tips of the prongs on your swiitch open as mine are? I found I can blow thru the switch, so that made me think that fluid could get down those connector prongs and the only thing sealing it would be the connector. I'm also trying to understand how the whole circuit works. I know when my fluid was low the pressure light come on I just don't understand the circuit. Thx.
Melting Slicks
Joined: Nov 2000
Posts: 3,388
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From: X
Re: Brake pressure switch leaking....HELP (Rich Shriver)
Hey Jon... Thanks for your input. Are the tips of the prongs on your swiitch open as mine are? I found I can blow thru the switch, so that made me think that fluid could get down those connector prongs and the only thing sealing it would be the connector. :yesnod: you can blow through it. I'm also trying to understand how the whole circuit works. I know when my fluid was low the pressure light come on I just don't understand the circuit. Thx.
Thread Starter
Instructor
Joined: Jul 1999
Posts: 159
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From: Cumming, GA
Re: Brake pressure switch leaking....HELP (Rich Shriver)
Thanks Jon that really helps. I'm going to inspect the master cylinder real close. Could be as you said theres some dirt or something that's keeping the plunger from properly sealing.
