1994 Cadillac SRX - STS 94 Cadillac STS frying blower motor

My 94 sts keeps frying these $200 blower motors. I have completely isolated it from spark plug wires and heat from the engine using a fiber heat shield. Anyway the wires arent arcing to the motor. They have a good 1" between them and the motor.

I normally have to replace the motor every 8 months but 2 motors including the one I just replaced lasted 10 mintues.

I understand the speed control is built into the motor but it recieves a digital signal from the ac programmer. Should I replace the programmer unit? Does the motor recieve a constant voltage?

SHould I buy a japanese car? Your help is so greatly appreciated you have no idea
steve