club car ds charging issue

[Airpirate]

48 volt club car ds, batteries two years old runs fine. My power drive charger is acting up. When I plug it in after the normal delay the meter moves to about 5 amps positive on the scale and then quickly drives downward and negative below the meter scale. Reset the OBC and no change.
Nay ideas?

[camaroluvz28]

In my experience this points to a bad rectifier inside the charger..perhaps someone else will chime in and confirm or give you some test procedures...