RV Repair: HELP !!!, fleetwood bounder, little bugger

Question
i recent purchased a 1999 Fleetwood Bounder 34j is great in all ways but... the batteries will not charge and was told is the invertor but for the life om i can not find the little bugger !!! Fleetwood told me is under either the sink or  stove but i see nothing under there ... so i need to run he motor a few minutes each day to recharge the batteries !!! the shore power works fine as thwe a/c and appliances run, but i know is time to start when the lights are "yellowing" HELP

Answer
could be under a bed, behind a false wall, really could be anywhere.  Try to follow the battery cables, mainly the positive.  Look around where the power lines for shore power is located.  A signal chaser could help you here.  put a signal on the battery cables and follow the signal to the other end of the cable.