Re: 1949 6volt to 12 volt conversion (gauges)

Posted by JWL On 2016/6/22 10:23:19

Good advice from the above posts. One additional comment. You will need a ballast resistor with your new 12-volt system coil if it is the type requiring an external resistor. You can also get a 12-volt system coil with an internal resistor. Either will work, but do not connect an external ballast resistor to a coil with an internal resistor. Also, those ballast resistors get hot and need to be mounted where they do not come into any contact with wires or hoses, and have plenty of room to dissipate the heat.

The ballast resistors are wired so that the resistor is by-passed during the starting of the engine allowing the full 12-volts goes to the coil, and then current is routed through the resistor after the engine has started. This may not be a need for your modification, but it was the conventional practice.

(o{}o)