NC Roamer

Hi, I just joined the forum. I saw that a few years ago you had a problem with no power to the radio, interior lights, ac, fridge etc and you checked battery, disconnected the ground to reset the disconnect switch, replaced the disconnect switch and nothing seen to work. I am experiencing the same issues with my 2005 Jayco Greyhawk. I purchased it used 2 years ago and am just experiencing problems now. Scheduled to drive from philly to myrtle beach on 8/29 and would like issue resolved so i can still go. How did you resolve your issue. Thank you in advance for your response.