48v CC dead,everythings dead

[rdfins]

Hi ,1st time for me,and i sure could use some help. 2001 cc 48V regen,I have owned it about 18 months and everything has been great,untill i notice batt. cables were pretty bad. I bought new and replaced them,from that point on nothing happens,no light, no sounds,no nothing.I checked each battery with load meter-OK, checked voltage across -48V, the fuses-OK, all connection cleaned & tight, the key switch has continuity.The charger does nothing,could the OBC cause this problem- can it be checked or bypassed? I'm stumped