Hi all. This is the second really stupid thing I have done in the last month. My battery was flat, so I installed one of my boat's batteries without checking polarity! This was just to get to the battery shop to have the original replaced. Of course, it all went wrong. Opposite polarity is a beeotch! After having installed a charged battery, nothing! Not one light illuminates on the dash with the ignition on! Does anyone know what gave?

Welcome to CA Gavinthechop!

Sounds like you have a big fuse and relay problem now. You will have to chaeck all of the fuses, relays and fuseable links.

Not sure what year you have, but check your owner's manual for the fuse and relay locations.