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1G Is brake switch capable of runing vacuum pump

Posted by GSX_Dan, Jun 3, 2020

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  1. GSX_Dan

    GSX_Dan Proven Member

    Joined Jun 27, 2004
    Chicago, Illinois
    Wondering if I need to add a relay to run a vacuum pump (audi) on my auto. Right now i have the 12v from brake switch going to pump and it sounds healthy, not blowing fuses. It's been like this for a while but I don't want to burn out the switch over time if it's not rated to handle that kinda load.
  2. llxkevinxll

    llxkevinxll Proven Member

    Joined Jan 29, 2012
    Cleveland, Ohio
    You'd likely be better off longer term using that 12v to switch a relay and let the relay with a direct battery connection handle the high current stuff. That's a relatively straight forward install and pretty cheap. I'd suggest going that route.

    140  1

    1997 Chevy S-10
    rwd · automatic · Misc Vehicles

    Autocross Build 3K  4

    1996 Eagle Talon TSi AWD
    11.90 @ 124.05 · 2G DSM

    Street Build 1K  1

    1992 Mitsubishi Eclipse GSX
    awd · manual · 1G DSM
  3. b00stedtalon2

    b00stedtalon2 Proven Member

    Joined Dec 19, 2005
    Detroit, Michigan
    Here you go.

    Attached Files:

    2K  1

    1994 Mitsubishi Evo
    automatic · Lancer Evolution

    Street Build 4K  1

    1993 Eagle Talon TSi AWD
    9.585 @ 143.96 · 1G DSM
  4. GSX_Dan

    GSX_Dan Proven Member

    Joined Jun 27, 2004
    Chicago, Illinois
    Thanks guys, will do. And who says the forums are dead? :nono:

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