Hi everyone! It's been a long time since I've been here but here I am again and I'm hoping some of you can help me out with the issue I'm having with my van!
It's a 1979 Dodge B300 extended cargo van. It has a 360 v8 2bbl engine...

So here's the deal... I recently started driving my van as my daily driver because of issues with my other vehicle and noticed the voltage is very high!
All the following readings were taken at the battery!
It idles at around 13.4v and goes up to 16.5 - 17v when the rpm's are increased!
With the headlights on it idles at 13.3v and goes up to 17v at high rpm's...
With just the blower motor on it idles at 13.0v and when rpm's are increased it goes up to 15.5 and slowly keeps going up...
With the lights and blower at the same time it idles at 12.9v and when rpm's are increased it goes up to 13.5v and slowly goes up....

I've cleaned and secured the connections on the back of the alternator! I did NOT check the connection between the alternator body and mounting bracket attached to the engine!
I cleaned and secured the ground connection on the voltage regulator to the firewall! I'm not really sure how to check the regulator with a voltage meter but here's what I did...
The regulator has two wires, red and green... The red wire connects to the center pin and that's the pin I attach the red probe from the multimeter and the black probe goes to the other pin at the top...

Here are the resistance settings and readings:
20M 9.5
2M 1.395
2K 1.965

With the probes reversed:
20M 9.13
2M 1.465
2k 1.165

These three settings on the multimeter are the only ones that gave me readings!
I also noticed when I removed the regulator from the firewall that the silicone/resin is completely detached from the metal body all the way around the edge and a bunch of sand poured out!!! I'll proved pictures in a little while, it's raining and I don't have a garage... 😕

It may be pretty clear that the issue is the regulator but I'm still learning and not 100% sure...