[xveganxcowboyx]

Kevin has got it. There is a temp switch below the main fan. It's a small screw in type near the lower passenger side radiator mount.

I believe the plug for the ac fan is the same. You could plug it into that and keep the ac switch on as a temporary fix. You could also use the AC switch and drivers side fan wiring as a trigger with a relay off the battery. Then it would be controllable and could operate all the time. As an added fail safe, I'm pretty sure the AC fan comes on if the temp gets too high so even if you forgot the switch it would still come on eventually.

*edit* if anyone has a link for the lower temp fan switch I'd love one. I'd prefer it to come on in the 190 - 195 range.