Recently I traded in my CK35 for a DK4210SE. I replaced the work lights with LED's. Next I started to install a radio. I had issues with the radio not holding any memory. My dome light in the cab was not working. The fuse diagram shows these 2 are on a 5A fuse. Opened the fuse box and indeed the 5A was blown. Replaced the fuse and then the tractor would not turn over. Took out the 5A fuse and the tractor started. Any ideas? Thanks John.