I just installed a second sound bar and a 4 channel marine amp, and now none of my gauges work. I get power to the gauge cluster but none of the gauges move, and the airbag light is on permanently. Also, the mileage reading is constant and never changes. Everything else works: lights, signals, horn, radio etc.. the gauges just don't budge. I have checked all the fuses, and they don't seem to be the problem. Does anyone have any ideas?