Ed on the 2000 Dip the ground bar is behind the dash on the driver side it's about 1 ft long and the only way I know to get to it is remove the dash and when you get to it it may not help you The early Monaco coaches had a crappy ground, have you noticed that when you turn on the lights the gauges go crazy. The simplest soulation is to forget about the Monaco entertainment center and invest in a VMSpc from silverleaf that you can set up the gauges, speedo, odometer ect like you want them , do a search for Silverleaf. I got tired of fooling with the crappy gauges in 01 and been using the VMSpc ever since and totally happy with it.
Walt & Will
2017 Ram Big Horn Crew C 4X4 w/ M&G