Heater Motor Problem, I just dont get it!! Options

[HorseHead]

Here it is, on my celi, the heater motor won't run, but there's 12v and ground on the connector (directly on the motor) But when I test the motor directly on the battery, with jumper wires, the motor works!! Did I miss something here? Anyone have an idea?

[HorseHead]

Ok I've found the problem.

Here it is, The blower was not functionning at all. First, I've cheked all the fuses. Take care, there's one nearby the blower motor:

All the fuses were good. Then I've check the voltage and the ground at the blower connector by backprobing it, I had 12v and the ground was good to. Next, I disconnect the blower, and with jumper wires, I connect it directly to the battery. The blower was running well, but once again, when all was connected right, the blower wasn't running. I disconnect the blower again, and check voltage, nothing!!! Stange isn't it? So then I suspected the rotary switch, I remove it from the car, and I opened it, suspecting bad contacts in it. Nothing once again. Then I've check the 12v entry, from the car, it was short to ground!!! The faulty wire is the White/Black:


Since that wire runs almost the entire car (so to speak), I've cut it, and run a new wire, from the fuse box to that white/black wire. And now, everything works just well. You see, even with short circuit, fuses didn't burn. And the 12v that I had when backprobing was the current "intended" for the blower relay, making it's way to the blower. Not enough to make the blower works, but enough to confuse me though. Just hoping this could help, if someone here encounter that problem one day. I'd like to thank Kerosene for his help!