batt / chg system troubleshooting

[Edro]

Bought a 2005 CC Precedent in September. It was part of a golf course fleet, so I have no maintenance history. Cart ran great at first (36 holes of golf easily done). Two weeks ago, it wouldn't make 27 holes. Now, it won't make 18 holes. After about 8 holes, amber battery LED light comes on when I am coasting (or braking) to a stop, and goes off about 3 seconds after stopping. By end of 16 holes, it is pretty much on constantly.

Have read all the many posts in this forum, so I know you want voltage readings (I don't know battery numbers, so I'll describe by location):

(Readings are : No Load, Under Load, While Charging)
Pass. Front 11.8, 9.8, 13.4
Pass. Rear 12.0, 10.0, 13.2
Driver Front 12.8, 10.8, 13.2
Driver Rear 12.4, 10.4, 13.2
Pack 51, (not tested under load), 54

Readings were taken 24 hours after complete charge cycle, then while under load, then while charging again.

Hydrometer readings vary widely within batteries -- anywhere from 1.05 to 1.26 within a battery.

Today, I charged just the passenger side batteries individually for one hour each, then plugged up to cart charger for a full cycle. Will advise results when completed.

Does this sound like new batteries are needed? I've read about so many other problems with CC 48V carts and their charging systems in this forum that I'm scared to plunk down $800 for new batteries, then find out they weren't the problem!

Really appreciate any help and/or advice!!