charging problem

You don't read ohms you read voltage. If you follow the directions I gave you exactly it will give you what we need to know. If you measured engine off at regulator and battery and there is .6 volts difference, that .6 will be added to whatever the regulator is set at.

In other words if the regulator is right at 14, PLUS the .6 V difference, you will be "charging" (running) 14.6 "at the battery."

The "easy" way to fix it is to break the "switched ignition" coming out of the bulkhead, us it to fire a relay, and power the relay contacts through a fuse or breaker from the start relay battery stud. Then feed all your switched underhood loads from the relay.