Voltage Regulator?

Relay installed and appears to be doing the trick. Battery voltage is steady at 13.9-14.1 after running down the road and recharging from the starter draw. Even immediately after start it was reading 14.7-14.9, not the 15.2 I was getting earlier!
If I understand this correctly, eliminating the voltage drop in the factory wiring and letting the voltage regulator read the actual battery level.
FYI, when I cut into the blue ignition wire there was evidence of corrosion, some slight tarnishing of the copper strands!
Again, thanks for sharing your knowledge.