Re: 1937 120 Conv. Sedan - Blanche

Posted by HH56 On 2024/3/30 17:55:48

Quote:
In the photo of your disassembled heater I see two motors, a fan, and a blower housing. One motor should operate the blower for the defroster function and the other motor operates the fan for the heater.

In another post you show two switches, one with a light color knob and another with a dark knob. I cannot see enough of the switch backs to tell if they are different type switches or which terminal is for the battery but with two switches, each switch would control one motor. The wiring diagram in the service letter shows the arrangement. A short supply wire from the ign sw connects to the BAT terminal on the heater switch and a jumper wire connects from that same BAT terminal over to the BAT terminal on the second or defroster switch. If there are no fuses on the switches I would suggest adding a 20 amp inline fuse in the short battery supply wire between the ign switch and heater switch connection. Where you position the switches on the dash is up to you but the service articles suggests the defroster switch is to the left of the driver and the heater is controlled by the switch toward the center of the car. The second terminal on each switch connects one of the wires at a motor. The other wire on each motor is grounded.