Cougar41, this is for you!
2005 Dodge Disco Dash FIXED!! I had all the signs-flickering odometer, dome lights and head lights flickering, gauges swinging wildly, all warning lights flashing on, radio going in and out, engine skipping a beat. I located, cleaned and tightened the instrument ground at the B pillar, plus removed the battery and battery box and cleaned and tightend the body ground. I cleaned and tightened the battery terminals and battery cable ends and checked the wiring harness under the battery for corrosion also. No luck. Then my mechanic, Scott of Scott's Auto Service in Pelham, AL(AAA certified), noticed my battery cable ends were a two-piece unit. If the battery cable on your Dodge/Chrysler/Plymouth/RAM has a nut and bolt between the wire and the terminal end, yours is probably a two-piece unit too. We removed the nut, separated the two parts and there it was...scale and corrosion. We scraped it somewhat clean with a knife, put it back together, started the van and got almost no flicker from the dash. I went to Walmart and bought a steel brush for two bucks, went home and grabbed the WD40, and went to work. I disassembled both terminal ends, cleaned them thoroughly with the brush, and sprayed them all over with the WD40. I put them back together and sprayed WD40 all over them again. I drove the van for a half hour to the office this morning. NO MORE DISCO DASH!!