I acquired this Yamaha golf cart with the seller honestly telling me that it does not charge. After verifying (with old batteries) that it was running on barely charged junk batteries, I proceeded to replace batteries with new ones. However, the charger was not charging it, it said CHARGING but would not put in a charge. After a while, the charger would say "ABNORMAL CYCLE". To verify that the charger does not, in fact, put a charge, I compared voltage across batteries with, and without, the charger turned on. The voltage was completely identical. Charger was model SCR481717.
After some consternation and looking at cheap Chinese chargers on ebay and amazon, I decided to open up the charger. I saw right away what the problem was, that a wire melted off from the Hasco relay. I recrimped a new spade terminal on it and the charger is now charging. The relay is a "HAT903CSAC120 Hasco 120VAC Electromechanical Relay" and is available inexpensively. Even though this Hasco relay is functional, it would be prudent to replace it, as it has heat damage. The charger seems to be actually charging now. I will keep an eye on it to see if it completes the charging cycle properly.