Got a 97 GT that we have been restoring for a few years. Finally got it painted and out driving it but not it runs very hot. Started with the basics, new thermostat, Flush the radiator. It the process of doing that we discovered that the fan is not coming on when it warms up. It will come on when the AC is on, so the fan is working and the relay that turns on the fan must be working. We have tested the original ECT sensor and tried 2 different ones including a Ford one. The Ohms read right about where they should when cold and hot. The fan will also come on anytime the ECT sensor is unplugged from its harness.
So it seems that the fan works, The ECT works, and the fan relay works, Only thing I can think of is the engine computer is not telling it to come on?
One last little tidbit. In the process of welding patches in the quarter panels when we were doing body work we managed to nuke the engine computer to the point we had a no start / no crank. Hauled it to the dealer. They didn't say exactly what they did, but it sounded like the re-flashed the computer to get it running again.
Any suggestions would be greatly appreciated.
So it seems that the fan works, The ECT works, and the fan relay works, Only thing I can think of is the engine computer is not telling it to come on?
One last little tidbit. In the process of welding patches in the quarter panels when we were doing body work we managed to nuke the engine computer to the point we had a no start / no crank. Hauled it to the dealer. They didn't say exactly what they did, but it sounded like the re-flashed the computer to get it running again.
Any suggestions would be greatly appreciated.