Going crazy with new Duster and over voltage issue.

67Dart273 said
No that would be normal. That charge voltage is just fine. Measure battery voltage after a couple hours of sitting dormant, or else run the headlights a couple minutes with engine shut off and see what that gets you. What you have now does not seem too bad A healthy fully charged battery is about 12.6 but this varies a little and with temperature

Another way to get an idea of battery "health" is to disable the ignition, and crank the starter for about 15 seconds while monitoring the battery voltage. The higher the better, but if it's above 10.5 consider it "GOOD"

One thing I've recommended as a "work around" for the ignition / VR "run" line to "fix" that is to cut the "run" (normally dark blue) where it comes out of the bulkhead. Use the bulkhead side to trigger a (such as) Bosch relay, and connect the engine bay end of the blue to the switched relay contacts. Feed the relay with a fuse/ breaker off the start relay "big stud." On a side note you can run the relay coil ground connection in through an unobtrusive switch to ground and create a simple anti-theft device.

Good idea and thanks for all your guys help. I just drove the car 20 miles and it ran perfect. Cant believe how smooth this slant 6 runs. i monitored the charge voltage several times during the drive and it was between 13.7 to 14.1 volts, so it seems pretty good now. One odd thing is that the fuel gauge was reading fine yesterday but today it seems to be stuck past the full mark. When i turn engine off it goes back down and when i turn ignition back on it goes to past full mark so i have a wiring/ sender unit issue there. Its never ending with these old cars lol

Mattax said
They way you have it wired now, if you see the ammeter showing discharge when driving with the lights, wiper, or heater fan on,
a) then its likely there's resistance in the factiry line from the alternator to the main splice.
b) If that's more than halfway toward 40 amps, fix that sooner than later. Continuously running more 25 or more amps through the 16 gage fusible link may cause it and its connections to get hot...

I will keep an eye on it, thanks for the heads up