Still struggling with this . . . Here's an update. I disconnected both wires that connect the ammeter gauge to try to isolate the problem. After disconnecting them, I was still not getting a charge to the battery.

I went to replace the voltage regulator and noticed that the brown wire that connects into the regulator was snapped off. I believe this wire supplies the generator light for the idiot gauges. This wire was taped off up at the cluster connector, since the idiot light was not needed anymore. Therefore, I'm thinking that that wire is not needed anyway, and it should not be causing the problem at the voltage regulator.

So, I installed the new voltage regulator (without the brown wire being connected) and it is still not charging the battery.

Any ideas? Does the brown wire need to be connected? Is there a trick to getting the voltage regulator pulsating? I need help!