1985 Corvette fans on all the time?

You are correct in wanting your electric fan to turn off. The ECM on your vehicle will not go into closed loop mode until the coolant temperature sensor will allow sufficient return voltage. It usually averages somewhere between 160 and 170°. The correct operating temperature for your engine is 195°. We can conclude that this is indeed an unwanted situation. Newer models would throw a diagnostic code illuminating the check engine light for the in capability of the engine to reach operating temperature.

A single lead connector is plugged into a sensor that is located on the passenger side cylinder head between cylinders one and three.

This is the coolant fan switch and is designed to complete a circuit when the engine temperature comes close to 195°

With a cold engine there should be no continuity from the sensor to the block. If there is, it would warrant the switches replacement.

Since a collision is involved the switch wire must be inspected.

I believe I do recall correctly it being a green wire with a pink stripe. If this wire anywhere a long the line from the temperature switch screwed into the cylinder head to the coolant fan relay has a breach and is grounding out, it will force the fan to remain on regardless of temperature. This is where I would look since there's a good likelihood that the collision may have affected this portion of the wiring loom. The 1984 wiring loom differences are quite subtle and would be considered an interchangeable part.

The bypass which is located in the heater control console. This vehicle is designed so that when the air conditioner is turned on, it will activate the coolant fan. The bypass which shares the same color wire that I gave above. It is in the exact same portion of the circuit so the same rules apply. If there is a breach anywhere from the bypass which to the place where his tapped into the circuit and is grounding out, the fan will be forced to remain on.

This should handle your problem in its entirety. If you have any questions feel free to e-mail me

Go to a speed shop and get a thermostat to an auxiliary fan.....attach the thermo to the side of the radiator ....connect it to the battery with a fuse ....and hook your stock fant to it....piece of cake

You have a nightmare on your hands. I had a friend with electrical problems with a corvette once. He went insane, and they had him lobotomized.