New Voltage Regulator at 15V?

Mike69cuda said
How good is the meter you are checking it with? Is it accurate?

$400 Fluke 87 which gets professionally calibrated every twelve months. I'm pretty confident that it is reading correctly.

Mattax said
Its a wee bit high for this time of year but see if it comes down after it warms up.
I don't know what's going on but it does seem like some of the electronic VRs are set higher than typical stock or run high for the first few minutes.
The other thing thats real important to check is for a voltage drop.
Take the voltmeter and measure the difference in voltage between the alternator output and the regulator control wire (usually blue). Could check it at the ballast resistor or the alternator - should be the same in both places. I assume this is a ground regulated alternator (regulator has the triangular plug, each alternator brush has a wire connection to the regualtor).

The 15V is measured at the battery terminals. I'll poke around a couple different spots and see if there is any difference. The alternator has two field connections and the black heavy output wire. No polarity marking on the fields or in the diagram so I just connect the field wires to suit the wire length. From what I've found, field polarity should make no difference in a properly functioning system.

I'm not sure I'm comfortable running it that high so we'll see how it settle out but I may be taking the VR back for a different one to try. I'll also swap in the old one just to confirm it's behavior, but it is a gooey mess on the back side and I don't want that crap dripping down the firewall.