I have an 01 club car 48v. the seloniod clicks and the cart tries to move but seems like it has low power. the batteries are at 48v. anybody have any sugestions?

 

If you only 48 volts I would say you've got weak batteries. You should be seeing a voltage around 51. How old are your batteries?

First I would disconnect every big cable (cables connecting battery to battery, cables to controller, cables to motor) and thoroughly clean the posts and connectors and re-connect making sure everything is good and tight. Check the water level in every battery cell (you have 24 to check). Fully charge the batteries. Then re-check to see if your performance has improved.