Is there away to test the display off the 4 wheeler or test the wiring? I had a bad battery that smoke the cdi. I replaced both and now only the display is not working I've cleaned the fuse and even replacement them all. I have power from two wires going to the display. So I know the backup fuse and the ignition fuse are good. I would like to apply power to the backup led in the display to see if it's the wiring on the atv is bad