z style

My friend has a radio for his savage 25 and for some reason the steering on the radio has been short circuiting. the servo is fine and i have checked it out with my radio. I took apart his radio and cut the wires and re sodered them to the place where i took them out and it worked but now its back to where the steering doesn't work. any ideas or advice that could help my out. its a small place towork in and the wire length isn't very much to play with in order to soder the wries and be able to move the motherboard around. tahnks for any help