Also: If you have the FAN-PWM V3 and you want to test whether you have this problem, it's really easy:

While the fan is running on Low, take a wire and connect it to ground somewhere, or battery negative. Then find a spot on the FAN-PWM where the bare metal is showing (you could scratch off a bit of the paint). Touch the other bare end of the wire there, and you'll get sparks, your fan will run on HIGH while the wire is touching, and after a couple seconds of this your FAN-PWM will start blinking an error code <img src="/forums/images/graemlins/kewl.gif" alt="" />

How else can you fix this problem without taking apart the unit? Simply install it in such a way that the metal outside of the unit will NEVER connect to ground. For example, glue it to the fender well with RTV, or something like that, I don't know. Sounds like a hassle to me, I expect things to have a chassis that is ground-safe.

2002 Sportage 4dr 4x4 soon to undergo an Extreme Makeover!