[FWDLK] Polarity of fan motor

[Tom Taylor <ttaylor530@xxxxxxxxxxxx>]

I replaced the heater fan motor with one I bought from an Ebay auction.  I can not determine which wire is ground and which is battery but I hooked it up and it runs.  Is this motor polarity sensitive or does it matter?  Did not seem to be getting much air out of the dash area, which might be telling me the answer,  but have nothing to compare to since the original heater fan was in-op when I bought the car.

 

Tom Taylor

1955 Dodge Coronet

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