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| | | | Joined: Jan 2016 Posts: 711 'Bolter | | 'Bolter Joined: Jan 2016 Posts: 711 | Hello all,
I'm at the end of a 12v conversion on my 3600 and I was wondering if anyone had a wiring diagram that included the heater/defrost motors in it? I have two variable switches and two motors in the unit itself. I haven't added in in-line resistors yet and that was next on my list, however the new 12v mechanical flasher socket seems to have a loose wire. When I wiggle it with the engine running, both heater motors turn on. This seems impossible since both switches for them are in the 'off' position, but that's what's happening. I just want to chase the heater wires back to make sure they are correct. I didn't have any issues like this with 6v, so this seems pretty odd to me.
Thanks! | | | | | Joined: Jan 2022 Posts: 2,496 'Bolter | | 'Bolter Joined: Jan 2022 Posts: 2,496 | The '48/'49 Chevy truck wiring diagram I just pulled from The Old Car Manual Project doesn't show the heater. Must have been an option.
Because of the "2 fan motor" heater/defroster you have I'm guessing your 12 volt conversion wiring system is aftermarket. Don't you have a diagram?
'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.
| | | | | Joined: Jan 2016 Posts: 711 'Bolter | | 'Bolter Joined: Jan 2016 Posts: 711 | This might be a Canadian thing or dealer installed. I guess there won't be any diagrams. Would it be best to wire this to the aux connector on the light switch? | | | | | Joined: May 2015 Posts: 11,168 Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums | | Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums Joined: May 2015 Posts: 11,168 | That's what I would do. Tie the feed for the two switches to the aux terminal of the ignition switch.
Kevin 1951 Chevy 3100 work truckFollow this saga in Project JournalPhotos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together. | | |
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