How to wire electric fans to stay on for a few minutes after engine is shut off?

[Andy4639]

Originally Posted by gmachinz

Just fyi...push-in style probes are accurate to +\- 10 degrees whereas a temp switch is +\-3 degrees. Sounds like you basically have the fan wired the way which works for ya-are you using a deep cycle battery or no?

No deep cycle just regular battery. The cooling effect after the motor is shut off is min. so if everything is working like it should the temp will be close to the 180* so that the fans only run for a few seconds after the motor is off.
I have drove them both and waited to see how they do and the most time the fan stayed on was 1 minute.