[RussWhite]

Steve,

I'll take a shot at an answer for you. In post #1 we know the motor has seized. I assume it gets replaced and in post #7 there is no power to the new motor and the other Steve thinks the fuse must have blown. Well it seems it did not and he is wondering why and you are looking at the picture of the burned relay socket. There is a possible sequece that would explain all this.
When the motor seized, as they seem to do, the resistance in the circuit goes down, so the current goes up. But, we know the current did not exceed 20 amps because the fuse did not clear. If the resistance of the motor, wires, switch, and relay added up to say one ohm, then the current would be about 14 amps, not enough to blow the fuse. That 14 amps at 14 volts would produce about 200 watts of heat - all heat since the motor is not turning. I suspect the connection between the relay socket and relay was not too good, and a considerable portion of that heat was generated right there. Since the fuse did not blow, it is reasonable to assume that the circuit may have been active and calling for the fan to run for a considerable period of time, all the while making the bad connection just get hotter and hotter. At some point it probably got hot enough to cause the connection to completely fail and current stopped flowing. Looks like a new socket and maybe even a new relay may be in order to get things back to working again. Russ