None of my engine gauges work with except of the oil pressure light. All analog gauges are pegged as though they are shorted. I disconnect DC power to all gauges and they remain pegged. Any suggestions? I have been on line looking for a new tach and no having to much luck. I did go to a unvisual dealer and they want something like $389. got s tach with hour meter but it seem high for a tach. Suggestions for good sources, types and brands of gauges will be appreciated. Thanks