High Charging Rate. Found Voltage Drop Need Guidance Please

I still suggest you schetch/modify a diagram of your car's wiring.
It sounds like there are now 3 paths to the junction at the ballast connector (j2 R5 E1)

If there is still a drop, then need to figure out what they have in common, or disconnect each to isolate the problem.
Then you can hunt voltage drops within the circuit that's carrying the current.
While doing so you might just spot it visually.
That's not a bad thing. wink-gif.gif