The connectors on the monitoring unit worked loose, first had problems with headlight not working. Took the cover off the fuse box pushed the unit down and headlites work. It happened again did the same thing but when I start the car I have no headlites and when I press on the brakes I have no brake lites and the fuel guage, water temp and charge guage slowly fall to zero. Speedometer works but tach doesn't. Can this be the unit itself? Thanks!!!! Madwill 1988 3.0 300E