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I bought a Vintage Air Gen2 heater defrost unit for my '52 3600. The truck is still 6 volt, and although I plan on converting to 12V, I can't during winter months because of lack of a garage to work in. My question is, can I use an 12v converter, which only goes as high as 15A, or will I have to have an auxiliary 12v battery just to power this heater? Or does anybody have any other ideas? I REALLY want to start driving this truck to work, 60 miles round trip, because it is a blast!

The problem with a 6 volt system and a converter to 12 volts is the current limits. To get a dc to dc converter that would supply 15 amps would be some big dollars. You can run a Radio, I pod, GPS and other low power stuff but the fan motor will be too much load. It might be cheaper to convert to 12 Volt or buy a 6 volt fan motor. The conversion to 12 volts is rather simple. But it does mean lights, regulator if you go with a generator, Voltage reducer for the gas gauge and a ballast resistor for the coil and points. A battery will cost about 100 dollars so even that is not a cheap alternative. If you plan on converting any way, start getting the bits together and talk your way into a garage. Beer helps

The old 6 volt blowers take 8 amps max. The same output at 12 volts would be 4 amps. Now I know the vintage air blower would be powerful but where did the 15 A come from? Does it have an electric heater?

The 15 amp is the converter, but the Vintage unit wants a 30amp fuse put inline to the battery, so I am sure it must draw more current than 15. Maybe I will just set a 12 volt battery on the floor, run the heater with that, and put it on the charger every night. Or just do without as I have the last two days I drove it to work!

15A or 30A sounds way to high for a truck heater fan motor. Hook it up to a battery and try different fuses. Or if you have a current meter check.

If you can't convert to 12 volts first, then maybe it would be easiest to slap a 6 volt heater in there for the winter. That would give you the winter to plan out the conversion, source parts and be ready for spring.

Dennis