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Discussion Starter #1
Hey guys, I did multiple searches on how to make a manual switch for the cooling fan but nothing useful came up. There was a link posted for corral.net but it's no longer working. Does anyone have instructions on how to do this mod? Thanks...
 

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3rd Gear Chirper
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Yeah, I did it on my car. Just get an on/off switch of your choice and connect one side to a good ground. Splice the other side into the wire on pin 46 (LG/P) on the PCM connector. Pin 46 contains Circuit 639 which is the signal line to the CCRM Hi-speed cooling fan relay. Therefore, when you or the PCM ground this lead, the relay is closed which activates the fan. If you want to do this to the low speed fan also, it's pin 45, circuit 197 (T/O) on the PCM.
 

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Discussion Starter #3
stupid question... Where is the PCM located and where yould be the best place to splice the wire?
 

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PCM is located on the inside passenger side footwell of the front seat.
Remove the plastic panel on the lower right were your feet would be
located behind the panel is the PCM.

Steve 4.6L
 
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