Dash lights and running lights arent working?!?

SOURCE: CHEVY 1500 TRUCK HEADLIGHTS TURN OFF WHEN YOU TURN ON SWITCH

If you have replaced the switch, and it is still doing it it sounds like you definately have a short somewhere in your wiring. On the other hand if the dimmer is in the turn signal arm ( forward bright back dim ) the problem could also be there in the dimmer switch, such as a short being caused by that dimmer switch being faulty.Auto Zone and Discount Auto Parts both test a lot of your electrical problems for free, and/or may have some knowledge to more accurately pin point the problem. Not sure about Pep Boys or some of the other discount auto part chains.

SOURCE: 2004 chevy impala no headlights

there's a button on the right side of the steering wheel that says serv push that button. It's put right there for when they use them as police cars you can cut the headlights off. You will probably notice that dash lights are on.

SOURCE: no front, or rear running lights, or dash lights

check tailight and instr light fuse with a test light rather than visably

SOURCE: 1998 cavalier headlights will not work. low or

check wiring in the front bumper for corrosion big problem relating to cavalier and sunfire

SOURCE: some dash lights do not work

if the headlight switch were bad....all of the instrument panel lights would be out, same with the fuse. More than likely you have some individual bulbs out, to change them requires disassembly of the dash. If you are not comfortable with that disassembly, I would recommend that you consult a shop. If you are comfortable with it, I'd say grab a Haynes book and go for it!