Electrical issue????
 

Recently installed supercharger and relocated battery from drivers side to passenger side. For some reason when I turn my headlights on, the dash lights won't work, the engine temp sensor spikes and pegs hot, the tach drops to zero and highbeam signal light comes on. What could be causing this?

this is a total shot in the dark....bad ground some where?
how many volts is your battery showing with out any thing turned on?
How many volts are showing when you have the key turned to the on position?

Instrument voltage regulator?

It was a ground that I forgot to put back on. Oops.