relay?

[chevymike]

gmachinz: Yes the dash switch is a manual override. If I turn it on, it will start the fan and will stay running until I turn it off or turn the key off (system runs off of switched ingition). If the fan switch is off, it runs in auto mode using the thermo switch to control the fan on/off times.

I don't know how your controller wants to be run. I my case, I am using the thermo or regular switch to control when the relay coil sees ground. Positive power to the relay coil is coming from a switched source which is why when I turn off car, the fan will stop. Didn't show that in the drawing. Sorry.



Hope this helps.