Electrical load problem

amp gauge
after initial recharge from cranking it shows just positive of 0.

While running the battery runs at 14.5V



I believe it's a 100 amp.



Checking at the ballast, to the coil 5.4v with no load. Was going to check with a load but realized i can't because my headlights arn't installed. It's at 4.68v fully loaded minus headlights lol....


after temporarily putting headlights back on it dives into the low 4's high 3's as it dies.

I had a similar issue after putting a new ballast resistor on my 73 Duster.

I tried swaping everything with extra parts I had to cure the issue and all wires looked great. I eventually swapped the old, but functioning resistor back in. The problem went away.

I am assuming that is was just a crappy replacement resistor, which wasnt well built.