Ok...so WOW.....This is an 7.5 year old thread!
I didnt even realize I had the car that long....LOL
Reviving it rather than start a new one since its the same question part deux.
I just installed the crackedback headlight relay setup so I figured now was a good time to look at stuff electrical again.
Since my original post, I have been running the car with high voltage.......so far, no issues. In fact, pretty sure I still have the same battery even!
I am still running high.....15.7 - 15.8 when cold at high idle....and it comes down to 15.6 or so when warmed up at idle......havent checked it HOT yet. This is measured on a voltmeter AND the summit in car voltage gauge.
Now, drop into gear and turn the lights on now and she comes down to very fidgety 12.8 or so and lights flicker etc until I give her gas and bring the rpms up....(before the relay kit it would be a little higher voltage as I recall, so its a true indication that the relay kit IS delivering more power to the lights!). The car is cammed and has always had a very rough in-drive idle....
Voltage at the BLUE wire at the alternator is 14.8 while running (with the battery voltage showing 15.7 or so)
I disconnected and probed the green wire at the alternator and connected my meters other lead to ground....about 1500 OHM, and that is with the VR plugged in. Unplug the VR and it goes to no connection......that seems like thats what SHOULD happen....so I think the green wire is NOT going to ground on its own....just when plugged in at the VR.
I even swapped in another VR, checked its grounds, even ran a separate ground from the VR case to the battery. NO CHANGE AT ALL.
Wiggled the two wires on the alternator, wiggles wires at the firewall....no change.
The manual says "check the ignition switch circuit between the battery terminal of ignition switch and voltage regulator"
Not sure I ever did that way back then.
Its a different alternator since then, having had one come apart on me on the way to carlisle a couple years ago.....
The main ground at the radiator support up front is clean as is the ground cable from the battery cable to it.....cable to engine is good....all the obvious stuff seems right.
Any new thoughts on my conundrum almost 8 years later??? LOL
Should I even worry at this point ??
I mean its been over 7 years....but still, it bugs me not knowing "why".