well, we found the first of MANY road construction /repair projects of the year (just the first one WE hit, the state starts them much earlier). and we were stuck there long enough that the coolant began to boil, and that is NEVER good, but twice as bad on this engine type (3.7l). so what i want to do is add a toggle switch , zener diode, and hot wire up to the electric fan. but having poor (hey, at least i own up to it) electrical skills, I am not certain exactly where to place the diode to prevent the 12v power to back feed into the computer. I'm also going to have to ask about replacing the engine cooling fan switch, and or coolant temperature (gauge sending unit), because the temperature never indicated hot at all. it showed exactly where "normal" operating temp always is. from what i can see in the service manual, the coolant temp sender appears to be the only temp sensor from the engine. so if that is the case, it makes sense that the fan never turned on.