Re: 12volt conversion voided clock, radio, fuel gauge function

Posted by Peter Packard On 2014/7/6 21:39:29

The 12V 1955 Packards used a Ballast resistor on the firewall to supply 8V to the instruments, which were basicall 6Volt instruments. In converting my 1938-120 to 12V, I used the ballast resistor from a japanese ignition coil to provide 8 volts to the instruments. 8 volts is near enough to the normal generator charging voltage for keeping a 6 volt battery ( 3 cells @ 2.5 volts per cell) fully charged.

PT