I'm having an issue in that my heater blower doesn't wor at all on my 99 Focus.

I replaced the resistor network, I realise now unecessarily.

I have the motor out and while the bearing is not really free it does turn, but I will lube it before reinstalling it. I tried running the motor on a bench PSU but it doesn't turn, maybe because the PSU will only deliver an amp ?? If I connect the motor terminals to an oscilloscope & spin the fan I get a kick on the scop trace indicating that it is generating some power.

I have checked that I have V+ at the motor lead with the ignition on. but oddly I get this on both wires going to the motor, which, to me would seem to be the problem, but I'm not quite sure how this is happening looking at the diagram someone posted earlier on this thread. Can anyone shed light on whether this is normal, or if it's a fault where it would be likely to be happening ?