Originally Posted by Jon Kerr
How close is your fan mounted to the transponder? Wires touching other wires can cause strange things to happen.
Thanks for the reply Jon,
My PT is on my from bumper, the motor fan is mounted on a heatsink with the fan over the endbell of my tc3, so in other words pretty much opposite ends of the car. As far as wires touching wires everything is away from the receiver and I've got a capacitor on the receiver anyway.
The best guess that I can come up with is that there's some sort of voltage spike. Perhaps putting some sort of capacitor/diode across the fan wires would help? It's just a coiled motor that powers the fan right?