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Thread: Which pin to hook electric fans up to? 2005 full size van pcm service# 12589462

  1. 06-02-2014 #1
    ca434sbc4
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    Which pin to hook electric fans up to? 2005 full size van pcm service# 12589462

    GM never used electric fans on the full size vans so there wiring diagrams don;t show which pins to connect the fan relays up to. The VCM has the option for 2 fans to be controlled.

    Anyone know the pin numbers ? This is a P40 pcm.
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  2. 06-02-2014 #2
    Jon S.
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    Quote Originally Posted by ca434sbc4 View Post
    GM never used electric fans on the full size vans so there wiring diagrams don;t show which pins to connect the fan relays up to. The VCM has the option for 2 fans to be controlled.

    Anyone know the pin numbers ? This is a P40 pcm.
    It is a P59 PCM - 1Mb with Blue / Green connectors. Use a fan wiring diagram from a 2004 to 2006 light duty truck (1500 series) or an Escalade / Tahoe.
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  3. 06-02-2014 #3
    ca434sbc4
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    Jon,

    Thanks for the info and the correction on the PCM model.
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