Cranks but won't start

Rewired the dash when i put in a 5" autometer tach, 5" autometer speedo, and a 2 5/8" fuel gauge in the stock gauge locations. Now the car cranks but won't start.

I have 12 volts from the ballast resistor all the way to the + coil, only when the - side is disconected, when the - side of the coil is connected it goes to 4 volts which would be why the car won't start, not enough power to jump the gap on the spark plugs. The only wires on the - side of the coil are the tach and the wire that goes to the orange ecu box, same thing happens with the tach disconnected.

ran fine before the rewire, only touched the gauge wires. I do have the ammeter + and - wires connected together. And with a timing light hooked up it to cyl #1 it sparks 1 time when the engine starts to crank over then sparks 1 time when i stop cranking but does not spark during cranking.