First of all, thanks . . . I appreciate the help. I’ve had this posted on a Mitsubishi Eclipse forum for two weeks, with no reply.
I have tried to keep my explanation simple, but . . . .
Here’s some answers:
I started the engine, and it is a fast idle, 1000 RPM.
The voltage at the battery was low to begin with, because I have not charged it for awhile . . . 12.3.
When I started the engine, the voltage at the battery terminals dropped to 11.5.
The voltage at the B connector and the Alt case is the same, 11.5.
The voltage between the B connector and the + terminal on the battery is ZERO.
Belt is snug and alternator is spinning.
The battery dash light was not on when I started the engine, but after about five minutes, it came on, then off, then on, then off. I shut the engine off and put the charger on.
The longer explanation is that it has been in the process of failing for a couple of months. Then, two weeks ago, it failed to start when I was leaving Wal Mart.
I got a jump, got it home, and charged the battery.
When the battery was charged, 12.7, I started the engine, and the voltage was 12.4. It continued to drop over the next 1/2 hour, until I shut it off at 11.6.
I took the alternator to O’Reilly, and it tested OK. I put it back on, started the engine, and the voltage at the battery was 14.4. Success, right?
The negative battery terminal connector was crappy, and didn’t fit snugly, which has been a problem in the past, so I put a new connector on.
The alternator has not been charging since.
I have not checked the ground yet.