Eric. Start with the battery terminals change them out. I to have had issues with my dash gauges to where my van wouldn't start I googled what it could be and said that the circuit boards are common issues and to beat on the dash so I did and it started right up. Well it did it to me again yesterday took it all apart and still nothing van wouldn't start. Checked my battery connections and changed the positive it was bad car started up but gauges still are bad. So I'll be checking relays or changing circuit board .