How do I convert my auto from 6 volt system to 12 volt?

Question

This is 1949 Chevy - how much apporximately will it cost to do this?

Answer 1

You'll need to replace all your wiring harnesses, fuses and gauges. All the existing wiring is a smaller gauge for the 6 volt system, a 12 volt system uses higher current and will burn out the 6 volt wiring. All your gages and electrical components are 6 volt. All of these will need to upgraded as well. It's not worth it unless your completely restoring the vehicle and you can tear the vehicle completely down and replace ALL wiring.

Answer 2

While you do have to change light bulbs and fabricate a bracket for an alternator, there is no need to be intimidated by this conversion. It is not that difficult. All the wiring can be used provided it is in sound condition. The gages, i.e. fuel, temp, ammeter, oil press are not a problem. The fuel gage voltage will require a resistor, the temp gage and oil pressure gage are typically mechanical and do not need any modification, and the ammeter will work correctly on 6 or 12 volts. You can do it!

Answer 3

Some articles to read. Not an easy job for a shadetree mechanic but not impossible. Cost depends on what all needs to be replaced and the kind of parts you buy. Example; 12 volt generator will be easier to mount to existing brackets, but will cost more. 12 Volt alternator will be cheaper to buy but harder to mount and wire. I would think $200-$300 hundred dollars would be a reasonable estimate if you do the work yourself.

Answer 4

You will have to change all bulbs or use resistors, which is very expensive, and also guages but, you don't have to change the wireing because as you double the voltage you cut the amperage in half Tthe wires have to be checked, to see what condition they are in also ypur generator and starter have to be changed

Answer 5

place a resistor in series