I finally got the heater fan switch (new from Classic) wired to the fan motor. Hooked the battery up and the fan went on. Problem is that the thee way switch is in the off position. It still runs in all three positions. Wire from motor goes to one pole of switch. The other is from accessory terminal on ignition switch to the other pole of the heater fan switch. . Is the switch bad or is it wired incorrectly?