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Thread: 04 truck Efan problem using pins 33 and 42

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  1. August 19th, 2007 #1
    BlackGMC
    BlackGMC is offline
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    Default 04 truck Efan problem using pins 33 and 42

    Well I finished my efan install today, however the computer is not turning them off and on correctly. I can use the Bi-directional controls to turn them off and on, both High and low speeds but using the modified 05 PCM setting/parameters does not seem to work. The fans just stay on High all the time.... Any advice would be great. Attached is a copy of my tune.
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