1998 Dodge Dakota

1998 Dodge Dakota 140,000 miles, 2.5L I-4
The blower stopped running. The resister is good. All the relays function and test OK. All wires show continuity. All connectors are tight. The wiring harness to blower shows 12.4-12.7 volts on the all-meter. The squirrel-cage blower is grounded to the same point on firewall as radio and the radio works. The fan, when pulled out of the truck runs at any speed from a variable voltage AC adapter. Put the blower back in the truck and it will not spin. Got any ideas?
August 7, 2007.

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