Day three power problem

[Robert & Teri Rahn]

I took the battery charger out of the bus. It is the original blue bird
one that weighs probably 50 pounds. I took the cover off of it and
there are no reset buttons or fuses. When I plug it into power, the fan
runs but there is no voltage at the output. Does this absolutely mean
it is bad. I bought a nice little charger at walmart and hooked it up
to the six batteries in the bus and it did not go into the charging
mode I checked the output and there was nothing. I took the same
charger to the gen battery that was weak and hooked it up and it went
into the charging mode quickly registering 13.5 volts. So based on this
can I condemn the six coach batteries and or the coach charger? The
batteries are dated March 2002 and are interstate. Thank you all so
much for your help it has been a fun project with your guidance.

Robert Rahn
88 pt 40
Kalispell, Mt.