I need help!! I have a 04 Ram w/5.9 Cummins. I'm at my wits end. Life was grand until my water pump went out. Replaced that and all was good for about a week. Then the dash lights up with ABS, Brake and Airbag lights. Then would die at redlights but start right up. Sometimes all the gauges will go dead then come back alive. I cleaned all the wire harnesses I could find and blew them out with air hose thinking some moisture was the problem. No help. Now tonight the dash lights look like a Christmas tree blinking on and off and the headlights came on and then went off 3 or 4 times. WTF? I've got 621K on this boy and shooting for a lot more. Any ideas? I don't want to replace the ECM to find out it's something like a loose wire. TIA

At wits end.

 

Possibly ECO but I'm thinking more it's the cluster.

621,000 eh? Sweet! I'm on my way to joining the 1,000,000 Mile Club. Just 998,919 miles to go, LOL...