I recently bought a 2000 Chevy Blazer and all was working fine. We've had some issues with the thermostat but all is working well now. Anyway, soon after we bought it the dash lights and gauges began to short on and off. The only ones that are consistent are the RPMs and MPHs; the rest short on and off working occasionally and for a short period of time. I don't exactly know what the issue is. I've heard anything from the ignition switch not giving enough power or something in the control panel. Any ideas?!

 

Mine is doing the same except mph stays on and everything else is like its shut off then runs funny after i was told to check the grounds under the dash