Quote: I'd be interested to see the circuitry inside the fan shroud/controller. Initially, you'd think it were just a large, maybe 70a relay that is housed internally. But if you're saying a variable voltage input would then use some sort of PWM to decrease or increase fan speed, there is no way that's the case. Break one open
OK, here's a fresh pic. This is also a 600w motor but it came from a GL450 SUV. I left the pic big so you can click on it and see details. It has two 2700 u-m caps and is obviously set up for two speed operation. The circuitry is a wee bit more complicated than what you'd need for a simple two speed fan motor. Can someone with a little more knowledge tell me what the green resistor thingie is for? I assume the electromagnet looking coil is there to provide a charge to the plates inside the windings.
