Dash lights on 67 Mustang

Hey guys just went to install instrument panel and my lights will only work when I hit the bright light switch, not correctly but they do light up....and I cannot dim them with the reostat on the light switch. They were working before and not sure what happened in the mean time.
 
Sounds to me like the only reason they work with the bright light switch is because that is a really bright bulb and the gauges near it get some of that light off of it, your dash lights are out all together, you either have a short somewhere or a bad connection. Take the gauge panel out and wiggle the main connector, if that don't work you will have to look deeper...perhaps the headlight switch may have a bad lug on it or the reostat is bad in your headlight switch, in fact I would probably just go to AutoZone, pick up a 20 dollar headlight switch and try that first since its easy to take out...