working on Clark TMG15 with 36v battery. condition of battery is 90% charged (+38v). truck was showing "code 68"and the dash was showing battery at 20%. line contactor was closing, hyd functions ok but no drive. we replaced slave controller. line contactor closes...we now have drive.. but now no hydraulics. dash now showing flashing "000" and battery symbol flashing. the handset showing 90 when connected to slave witch i'm sure is the state of battery. when handset connected to master it shows 000 just like the dash except it does not flash. is this an adjustment issue with the BDI? any help is appreciated.