[toms68cst]

Thanks everyone. My friend went ahead and wired the fan through the sperate thermostat. He said it worked ok except for some short-cycling. He could see the temp display on the terminator drop a lot when the fan kicked on. I suggested that he try the Terminator control as it allows you to select switch on and switch off temps.

I suspect the problems mentioned by the radiator shop have more to do with wiring issues or misunderstandings than inherent problems with the ECU itself.