I’ve got a crack of the factory diagnostic software, when I run either fan speed actuation (low or high) via the
PCM it tells me the operation cannot be completed.
I presume it sends out the relevant command but is not getting the return signal expected. This is where I’m stuck without a scope.
Have been wondering how hard it might be to strip away the potting and see what’s under there. Don’t think it’s TO-3s as there’s nothing on the heatsink side that would reflect their riveting.
Edit to add, physically the motor is 100%. So I don’t feel it’s cooked its guts pushing a stiff motor.