The fan kinda has a mind of it's own. It's run by a temp switch that doesn't care if the car is on or off only what the coolant temp is. Most times it won't run at all on the highway and will kick on and off in town. However if the a/c is on I believe it runs the fan on high speed all the time. Again pretty simple system I believe if the a/c is turned to the on position it turns the fan on even if the engine is not running but the key is in the on position. |