Is the charger shutting off at the end of a charge cycle? Normally the only thing that goes bad is the timer board unless they get struck by lightning.
Battery maintenance is the most important thing. Add distilled water as needed and keep all the connections clean and tight...
36V charger is not charging. Shows battery voltage on display. I need a troubleshooting tree in order to test and rule our components. Timer working, ac ok, fuses and circuit breaker ok, relay on control board is energizing. EZ-GO Textron Total Charge II.
It looks like you've tested everything except the diodes. I would clean the contacts on the DC charger plug and the charger receptacle on the cart. Can you try the charger on another cart?