The other day thr 12 volt power to the rv suddenly quit. The 110 is workinhg fine but nothing else. I replace the batteries and connected them in series. I discussed the problem with a technician and he suggested that there may be a 12 volt converter breaked that has been tripped. Have looked all through the coach with no luck as to it's location. My unit is a Holiday Rambler Imperial. Any suggestions would be greatly appreciated!