You may have too many amps drawing power from that one connection and it is blowing the ACC fuse. It's like what happens when you turn on a heater and a hair dryer in the same outlet or circuit, and it trips a breaker in your house. There maybe another ACC connection that uses a different fuse that you can tap into. Or you could wire in a new accessory into the accessory fuse box. They have a lot of empty slots, and just place a fuse in it. It's kind of like putting a new hard drive into a empty slot on your computer.