Getting an E-NET error code on my M110GX. Service Manual says "CANBus wire is short circuited". This error happened after a battery change. IO have traced the lines and see no sign of rodents that could have chewed through a wire so I am afraid I may have zapped one of my ECUs but not sure how to troubleshoot. Tractor will try to crank but just turns over. Left panel displays "Can BUS". Any ideas???