So I had the battery checked and it had a dead cell. so i bought a new one. the problem is i didnt pay attention to which post is what when i disconnected. Now i have always been told red is positive.. does that hold true in the rv?? I have hooked it up that way but now the radio does not work. I have checked the fuse in the main box for the radio and it looks good but I dont know. Any ideas from you guys who have been doing this longer than me?