H/R, THIS IS THE THING. THE ON BOARD COMPUTER HAS BEEN BY PASSED. YEAR OR 2 AGO.I GOT THE CART SMASHED UP. I HAD AN OLDER MODEL CART. WHAT I DID WAS TRANSFER THE 1995 CART TO THE 1986 FRAME. IT RUNS BUT WILL NOT CHARGE. OF COURSE AFTER I FIXED IT THE KIDS RAN THE BATTERY DOWN. ALL THE BATTERIES ARE AROUND 7.3. THE CHARGER DOES WORK IN A FRIENDS CART. I SIMPLY PUT EVERYTHING BACK WHERE IS WAS. I DID CHECK THE WIRING FOR THE ON BOARD I UNDERSTAND IT TO BE THE SMALL GRAY CONNECTS TO GRAY OUT OF CHARGER UNIT AND THE HEAVY BLACK TO THE B- ON CONTROLLER...YES? THEN BLACK OUT OF ON BOARD TO #6 NEG? AS WE SEAT RIGHT NOW I ONLY HAVE 46 VOLTS.