I am rebuilding my heater assembly and am not sure if it has ever been upgraded to 12v. This heater has two motors, one for the cab and one for defrost. I tested both and they work but did not run them long since I was testing with 12v. Question:
1) Is there any way to tell if it is a 6 or 12 volt motor.
2) If six volt, can I just install a voltage reducer for these.
3) This heater has a Chevrolet metal decal on it with a rectangular core, no fresh air. Would this be original to a "48" cab. Name on back plate is Harrison HO-147.
Thanks

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