Re: 1937 120 Conv. Sedan - Blanche

Posted by HH56 On 2024/3/29 21:54:27

I believe the stock 37 one direction heater motor would have 2 wires, one for ground and one for power. Defroster would have a separate motor with the same wiring. I don't think the heaters with the combination heat/defrost controlled by a reversible motor was available in 37 but those motors had 4 wires and used a 5 position switch with 4 terminals.

While the heater install on the last page of this service letter is of a later heater I believe the wiring suggestion might the same or at least very similar in 37s.