55 1st series electrical issue

[enick72]

So I got all my tune-up stuff installed, new battery, cleaned and tested the fuel pump and have fuel line running out of a small can ( for the time being). I was cranking it over and got it to fire and run for a couple seconds
I was pretty excided untill I tried again, nothing. I have no starter, headlights, horn. If I hold a test light on the coil (ignition on) I have power, as soon as I press the button on the starter it disapears. If I remove the test light and put it back the light comes back on.
This is a 6v system, all original. Where should I start looking? System is very simple, I have scanned over the whole harness and don't see anything melted and the only 2 fuses I found were for tail and stop lights.