Appears my dimmer switch is gone. When the headlights are on I have no gauge lights. If i turn the dimmer switch all the way to rt the dome light will come on and then the gauge lights will work. I have it rigged up now and just leave the switch turned all the way to the rt and have pulled the bulb out of the dome light. If it try to dim the lights by turning switch back to the left all the gauge lights go out. I assume the switch is bad. Has anyone replaced this part? If so what is involved? Seems like it would not be difficult but I have not looked at it closely. Thanks for any help.