................."Now the fan wont turn off when I shut the car off
sometimes"......
......so I had to disconnect the battery.
"I also have a painless thermostatic switch thats suppose to turn on the fan when the temperature reaches 185
then off at 170"..........QUOTE]
At least D.Hearnes' post got one problem solved for you (and I learned something new)
I underlined what I think are key points in your post above.
Do you expect the fan to stop as soon as you shut your engine off everytime?, for instance, when you shut the car off do you allow the thermostat to cool to below 170? or shut the fan off manually right away?
The fan should continue to run after the engine is off for awhile untill the engine cools below 170 before kicking off the thermostatic switch with these units I assume.
Main Question: Have you ever waited 5 minutes or so after shutting off engine to see if the fan goes off later on its own, after the engine has cooled? I'm assuming these units are designed to run like they do on todays conventional cars as I've never used one
.
Edit: I just re-read your post again, if your having to go manual as well because your headed toward overheating we're back to sqaure one again. (hey I'm really tired today)
Recheck all the wiring, maybe this manual switch is causing the problems, have you given it a shot with out the switch hooked up and just let the thermo switch do it's job?