The Dashboard lights went off on my 1986 300zx. I have power to the dimmer switch. (Not sure if the switch is good). My tail and brake lights work, all of the other lights work too. (headlights, glove box, overhead,marker lights,back up lights and audio headlight warning. I have heard that the switch can cause this but it is usually in with nonworking tail lights. Can I bypass the switch to test if it is the problem. If not do you have any other suggestions? thanks

dummy light (light) comes on when brake pedal is pressed