I've replaced the hazard switch broken when the radio was ripped from
the dash of my 1997 Accord DX. The turn signals and hazards are now
working again.

However, I have no dashboard gauges -- speedometer, RPM, etc. -- and
the rear defroster light does not come on when I press the button.

The car sat for a week and I needed a jump start to get it running
again. I'm not sure if this has anything to do with the gauges no
longer functioning.

What do I need to do to repair this problem? Is there some sort of
wiring involved?