If your radio has transistors in it, which I would think it does, you cannot convert it. There may be some 12 to 12v polarity converters on the market that could be used.

What was the reason they gave you for switching it back?


1951 GMC 1 Ton Flatbed -- It is finally on the road and what a great time I have driving it!
1951 1 Ton Completed


My Chevy Master 4 Door is on the Road!