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1. 

   1970 FJ40 Ballast resistor

   I tried that, by first looking at the '73 wiring diagram on Coolerman's website. It has an OEM diagram labeled "FJ40 1972/1973". My '73 definitely has the ballast resistor, but the wiring diagram didn't show it. Later diagrams, which have the three element (red/amber/white) rear combination...

   • Words: 58
   • 73FJ40
   • Post #11
   • Mar 26, 2022
   • Forum: 40- / 55-Series Tech
2. 

   1970 FJ40 Ballast resistor

   @Crinkler Your coil may or may not need the ballast resistor, depending on the construction of the coil. Some aftermarket coils have internal resistors, obviating the need for the external resistor. Maybe a PO made the change sometime in the last 50 years. The only way to know for certain...

   • Words: 230
   • 73FJ40
   • Post #8
   • Mar 26, 2022
   • Forum: 40- / 55-Series Tech
3. 

   1970 FJ40 Ballast resistor

   Ballast resistor is stock on all F engines, 6903 - 7501, using OEM coil compatible with ballast resistor.

   • Words: 17
   • 73FJ40
   • Post #3
   • Mar 25, 2022
   • Forum: 40- / 55-Series Tech