LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Cooling fans dont start!

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Old 04-25-2009, 08:33 PM
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Default Cooling fans dont start!

I did the DIY fan switch mod a long time ago so i can switch them on whenever. It works great too. The only problem is that the fans wont run without me hitting the switch. So far everythings still good But i really need this fixed now. I have the switch so if flip it down the low fans come and when its up the fast kicks on. can someone help me.
Old 04-25-2009, 09:11 PM
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did you cut the wires goin to the pcm or the harness to the fan switch to make your own fan switch
Old 04-25-2009, 09:16 PM
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Yes. I forgot where i found the writeup.
Old 04-26-2009, 08:24 AM
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If you cut the wires to the computer, they will never come on without you turning them on. It's working correctly as you wired it. If you do a switch like shown on my Tech Page, it will still work with the computer and by manual override.



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