Probably just need to adjust your dash lighting dimmer. Dash lights are supposed to dim when you turn the headlights on, but if you have the dimmer turned down enough they will turn off completely.
-The MinisterofDOOM 
|The Q of DOOM| - |The Maxima| - | Hear my Q!|
4.08 VLSD, NICO 8-way ECU, full exhaust with custom headers,
Tokico Blues with Eibach springs, Stillen FSTB, 20mm RSB