RE: Dash/interior lights flicker and gauges jump
You might want to check panel dimming control on left side of steering wheel on dash. It may be bad.
Or possibly a bad cluster or ground.
2004 Neon SE -- [size=1]K&N CAI, R/T Muffler, Booger Bushings, Prothane Suspension & Race MM Inserts, Vitor's TM Inserts, Progress 22MM Rear Sway Bar w/ Energy Suspension 2 3/8" End Links, Vogtland Springs, KYB GR2 Struts, Vibrant Type V Strut Bars[/size