Without knowing make/model, I would say check the panel light fuse. Probably labled "PNL".
Check fuses, common circuit
Yes.
it is most likely that it is a relay if both your tail lights and your dash lights are not turning on when your head lights are on, because your head lights run off of their own fuse it is most likely that it is a relay if both your tail lights and your dash lights are not turning on when your head lights are on, because your head lights run off of their own fuse
This sounds like a bad light switch. The head lights are usually wired seperately from all other lights so the only common point is at the switch.
lights flashing on an a/c control head usually indicate a pressure problem in the .c system. possibly low on freon
Check the dimmer setting for the dash lights. There should be a dial to adjust the brightness on the dash to the left of the steering wheel.
Yes.
Check the fuse box. The problem is probably a burnt out tail-light switch.
It is most likely the tail fuse. The dash and tail lights are usually on the same circuit
There is a power or ground wire hooked up backwards. (95%sure)
Try turning the dimmer switch up. It's located under the headlight switch. Roll it towards the steering wheel to brighten the dash lights, and away to dim them. If this doesn't solve the problem then you have a blown fuse or a short somewhere. Let's hope it's the dimmer.
Check for a loose ground wire - sounds like lights are backfeeding searching for ground