Dash lights haywire
 

On My 2006 rx8 all the dash lights came on, speedo went out and loss of power steering. This happens intermittently. I was told possible ecu bad ground

check your grounds and the battery connections. the batt terminals get very dirty and can cause issues. clean them and retighten

Battery terminals are good and all the grounds I can find look fine. Cannot find where my ecu is grounded

Get your alternator tested, I had similar issues and my alternator overcharged and ruined a few components to the tune of a couple thousand dollars. It's rare but it has happened.

Yeah I'll try that... At least my aunt works at a mazda dealership