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Thread: 89 open conversion aux. fan issues

  1. #1
    Join Date
    Feb 2013
    Location
    Vista
    Posts
    3

    Default 89 open conversion aux. fan issues

    I converted to an open cooling system and continue to have issues with the fan switch. The switch is a Napa fs113, wired to a relay. Switch will work for a short period of time and then die. When I test the relay, by-passing the switch grounding with jumper fan kicks on. On the relay when I go to ground with a circuit tester, I have a small amount of voltage? I want to keep the automatic switch. Any help is greatly appreciated.

  2. #2
    Join Date
    Sep 2009
    Location
    Chico, CA
    Posts
    29,847

    Default Re: 89 open conversion aux. fan issues

    Have you checked the resistance of the switch and the voltage drop?
    230 hp 4.3L Chevy
    Built 4L60E with manual lockout
    Atlas 4 speed
    Griffin radiator
    On board air
    Warn 9.5ti on custom bumper
    7.5" RE front and bastard pack rear on custom long arms
    30 gal gas tank
    lockers
    And a bunch of other stuff

  3. #3
    Join Date
    Feb 2013
    Location
    Vista
    Posts
    3

    Default Re: 89 open conversion aux. fan issues

    No I have not. I have read several write ups on converting and several recommend this switch. Normally open and when temp is reached, goes to ground, relay then reacts.

  4. #4
    Join Date
    Feb 2013
    Location
    Vista
    Posts
    3

    Default Re: 89 open conversion aux. fan issues

    checked the voltage drop, and resistance. Nothing, another bad switch, number 4. Have a new one on the way, last try with this brand of switch!.

    Thanks again.

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