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[QUOTE=Don;2107458]You should have a single wire with clip coming from battery box this wire connects to points on dist and when points close you get a light or just connecting the wire to frame of jig it should light.[/QUOT
With respect, actually I believe there should be two wires coming from the battery “compartment “. One goes to the alligator clip while the other one goes under the disc and attaches to an insulated piece of brass that the bulb end touches when screwed into the bulb socket. If you painted the fixture, you have to make sure your distributor grounds. To check this touch the alligator clip to a bare metal area of the fixture and the distributor body (with points closed). The light should come on when you touch either. The earliest versions did have the spring loaded terminals but they are rare. In the service bulletins, Ford asked dealers to upgrade that version and convert them to the ones with alligator clips. I have restored several of these fixtures. Also, 6v is too much. You probably blew the bulb. It’s a flashlight bulb.
Another problem area is where the wires attach to the battery terminals. Many times the small screws that hold the terminals to the wood (if you have the early version) are enlarged and don’t allow for a good, tight connection. Make sure your wires are clean and your brass terminals are not corroded where they touch the wires. If you have the metal box version, remove the small screw and nut. Clean all connections but be easy on the insulators as they will be fragile from age.
All this is assuming your bulb is good as well as your two “D” batteries.