Electrical problems

Worked on a few things...changed the oil and filter, installed a hood release rod (never had one), and mini gauges (oil pressure, engine temp, and amps).

Gauges went in fine but now I have an electrical issue...The lights under the dash stay on all the time. I disconnected the gauges and still have the problem. I also noticed that the dash lights, top motor and the wipers don't work. Motors could be mechanical, but something tells me there is a ground or corrosion issue somewhere.