65 Dart 273 Commando Ballast Resistor
Measure the primary coil resistance. Measure the voltage to the coil primary and calulate the ballast resistance needed. NAPA has some ballast resistors values to choose from to get close to 5amps thru the coil primary. Example: 10V to primary coil (some voltage drops thru circuit) ballast resistance 1ohm, primary coil resistance 1ohm. 10Volts/1ohm+1ohm=5amps.
