At times when I accelerate the entire dash clusters and dash lights, radio, and ac go out and the headlights switch to highbeams until I let off the throttle and everything turns back on. Any idea what would cause this?

 

not much info to go on here.

Excerate = accelerate ??

have battery and alternator tested and scan for codes.

post back with info.

 

Both have been tested and show no codes

 

I'd inspect the ground lugs behind each kick panel see if they are rusted out.