I HAVE AN 88 EZ GO THE BATTERIES RUN DOWN AFTER 4 TRIPS OF ABOUT 3/4 MILE COULD IT BE BRUSHES.I HAD THE BATTERIES CHECKED THEY WERE PERFECT. I HAVE 3 12V DEEP CYCLE BATTERYS IT USED TO GO 3 DAYS ON A CHARGE.HOW DO I CHECK THE BRUSHES DOES ANY ONE HAVE A BREAKDOWN ON THE MOTOR ASSEMBLY.THANKS MOTOR # IS GE 5BC48JB833 2HP,2800 RPM