[jayhawk]

I am placing myself at the mercy of the court.

I have had a serious issue with the charging system the Pumpkin (1982 930)

A long story but here are the details:

Symptoms:

Battery not charging.
Tach acting crazy when battery losses power.

Facts:

1 - Battery fully charged (new) voltmeter on battery 12.7 V
2- While running battery voltage drops to about 11.7
3- Clearly battery is not being charged. Battery dead after a 1 day track event

Last fall, the battery was dead at the track after a few runs. Voltage while the engine running at the battery was 11.9

Obviously we thought alternator was at fault. Replaced the alternator with a Bosch rebuilt unit over the winter. After the first
t event this year, clearly the battery was not bing charged.

I took the alternator out this weekend and the local shop pronounced it to be working fine. I saw the 14.2 volts on the meter on the alternator test stand.

Here is what i have checked:

I have full battery voltage at red wire to the alternator.

I have 11.4 volts at the "blue" wire to the alternator when ignition is on at the alternator.

I have cleaned and redone all the grounds including replacing the engine to body strap and all the other ground points i could find.

I checked voltage at the starter connections, full battery voltage then a but lower while engine was running.

I connected en
gine ground directly to the negative battery post with no change in voltage results.

Clearly the alternator is not chargoing the battery. HELP

Bob