The Ford Barn - View Single Post - Advice to change 6 volt to 12 volt Model A

Tim · 12-12-2010, 08:51 PM

Well I changed mine for a more modern ignition. I understand the 6V system and its bennefits well. But I still needed the 12 volt for the Mallory. I used a GM alternator, big pulley and changed the light bulbs. merely switched the cables around. Took about 2 hours. I had already re-wired the whole car, this should be a step for you as well. When you order a harness make sure you use the 6-volt stock set up. It's heavy wire and 6 volt wiring is always heavier and typically better quality because of it. That right there may solve your issues if you are using stock original or very old corroded wiring.

Having said that, the old 6 volt worked just fine before I wanted to change the ignition. It's really mox nix either way. Your headlights are brighter on 12 versus 6 but that's about it.

Tim

12-12-2010, 08:51 PM	#41
Tim Senior Member Join Date: May 2010 Location: Aptos, CA Posts: 332	Re: Advice to change 6 volt to 12 volt Model A Well I changed mine for a more modern ignition. I understand the 6V system and its bennefits well. But I still needed the 12 volt for the Mallory. I used a GM alternator, big pulley and changed the light bulbs. merely switched the cables around. Took about 2 hours. I had already re-wired the whole car, this should be a step for you as well. When you order a harness make sure you use the 6-volt stock set up. It's heavy wire and 6 volt wiring is always heavier and typically better quality because of it. That right there may solve your issues if you are using stock original or very old corroded wiring. Having said that, the old 6 volt worked just fine before I wanted to change the ignition. It's really mox nix either way. Your headlights are brighter on 12 versus 6 but that's about it. Tim