Puzzled... In a moment of self-challenge, I thought I'd do a little experiment. Trying some small nails, I found some that were a tight fit into the damaged end of the connector on the PEM-end of the wiring harness. The PEM fan positive is toast, but the motor positive isn't in too bad a shape, and the nail seemed to make a tight fit.. Soldering some twin lead to the nails, with a power pole on the other end, I re-connected the "loose" pair of connectors at the blower motor end. 12v in at the PEM-end, and the blower spins normally, pulling about 11.8 amps. Nice.
The test: If my theory is correct, I should be able to tug and wiggle the supposedly loose wires and get the fan to cut out, or at least have the current drop markedly. Couldn't do it, at least it didn't seem so.
So, if the connectors, or specifically the positive pole of such, can't come loose, then the conclusion about it being the root cause of the failure at the PEM-end doesn't hold water. And in this test, I was supplying the entire motor load on one set of wires, vs the normal case where it's shared among the two sets. That should have made it easier to see the failure, yet, no failure was seen.
What am I missing? It all seemed so perfect.
The test: If my theory is correct, I should be able to tug and wiggle the supposedly loose wires and get the fan to cut out, or at least have the current drop markedly. Couldn't do it, at least it didn't seem so.
So, if the connectors, or specifically the positive pole of such, can't come loose, then the conclusion about it being the root cause of the failure at the PEM-end doesn't hold water. And in this test, I was supplying the entire motor load on one set of wires, vs the normal case where it's shared among the two sets. That should have made it easier to see the failure, yet, no failure was seen.
What am I missing? It all seemed so perfect.