1992 Bounder Gauge Issue

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I'm hoping someone can help me out with a Gauge issue. I have a 1992 Bounder Diesel pusher Cummins engine on an Oshkosh Chassis. The battery & water temp gauges do not work and neither does the speedometer or odometer. The fuel & oil pressure gauges and Tach work fine. Fuses checked and seem fine.

The other electrical issue I have found is the coach batteries do not want to charge on shore power. The chassis battery is getting plenty of charge from the alternator and works great.

Any ideas on what could be going on?

[GraySeal65]

I would think to loose 3 gauges you had to have lost the power or ground for them, the coach batteries not charging on shore power would be a converter issue?

[stink]

most coaches that charge both the coach and chassis batterys are equiped with a BIRD system. I don't think yours has this. The converter/charger only charges the coach batterys and some folks will hook up a float charger to the chassis batterys while parked.
As to the guages, you might have a printed circuit board problem or a loose connection. Some guage panels had a power supply for some of the guages. You might check power to the guages with a voltmeter and see were the power/ground stops.