Sounds like multiple problems..
You need to replace the batteries IN PAIRS (we can't say this enough around here), the go back and recheck the alternator.
It also sounds like you have a bad body ground.
Get checking those ground wires; feel around the body near them, see if they're warm. Heat means high resistance. Take them apart & check them anyway. No shortcuts.
You need to replace the batteries IN PAIRS (we can't say this enough around here), the go back and recheck the alternator.
It also sounds like you have a bad body ground.
Get checking those ground wires; feel around the body near them, see if they're warm. Heat means high resistance. Take them apart & check them anyway. No shortcuts.