A caveat: This particular "stepless control switch" will not work IF your heater fan motor only has one wire (the positive wire) and no ground wire.
Another caveat: It may induce electrical noise that is picked up by your radio, especially on the AM band.
Last edited by Bill Hanlon; 02/05/2024 5:19 PM.
'57 GMC 102, Original 347 V8, HydraMatic, 3.08 rear gear, added A/C, disk front brakes, HEI, AFB carb, '98 Honda Black Currant paint. T-boned and totaled 10/12
'52 GMC 152 Stake Bed, Original 228, SM420, added A/C, HEI, disk front brakes, '67 Chev 3.55 rear gear. Gets used as a real truck.
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