[QUOTE=ajbrown;368489]First off, I would
(finally got to use that smiley)
They may be salvageable, they may not. You have to get the collective pack up to 36 volts to get the charger to kick on (assuming 6-8 volt batteries). You can charge one at a time with a 12 volt car charger. When I did this I set the charger on a low amperage and manual.
Cover the plates with water and try to charge each to see if they will hold 7 volts. Keep an eye on them, monitoring for heat and voltage. You do not need to remove battery from pack to charge.
Six months is a long time to leave a pack. I cannot answer the tow switch question as my carts are series carts. When I leave them I disconnect the pack completely.
when i bought my house it came with a golf cart. 6 8volt batterys.
it sat for 14 months without a charge and was dead as a door-nail 'whatever a dead door-nail is' ! i did exactly as alan describes and it worked perfect.