A set of points can only survive a current flow of 5 amps, maximum, and with a system voltage of 7.5 or so with the engine running and the generator charging properly, your 6V coil primary resistance should be around 1.5-2 ohms.
Forget measuring resistance. Very few ohmmeters are that accurate. Instead measure the voltage at coil. You want 6v at coil and 6v across the ballast works for my Jubilee.
3 ohms you may have a 12v coil. no ballast needed.
Bottom line, measure the current. I think most primary currents are about 4 amps.
My Jubilee measures 4 amps, 6v on coil and 6v on ballast. Points last a very long time. Excessive current and you will complain they don't make points like they used to..
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