Re: How to wire electric fans to stay on for a few minutes after engine is shut off?
If you want them to stay on, you will probably need a delay like gmachinz mentioned if you want to keep your existing circuits.
You could buy a temperature control device like others have mentioned.
If you want, I can post a guide on how to make to a circuit interrupter that opens your switch ground so that the fan turns off with the key. I had to do this with my setup, otherwise the fan would run for about 15 minutes after I turned the key off.
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1972 GMC Jimmy Custom 4.8L (L20)/6L90E/NP205
1989 Chevy Suburban V2500 350/Turbo 400/4.11 gears
1996 Chevy Suburban K1500 350/4L60E
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