Got a 98 k1500 4wd changed the turn indicators on the pass side one was out and the other broke front of truck put the wrong bulbs at first and all lights flashed.. checked the number on the other side put correct ones in blinkers work fine but now the entire dash illumination is gone.. check engine fuel airbag all those lights still work just illumination on guages dont light up at all.. tail lights were out fuse was burnt replaced it lights work now but still no dash illumination.... im kinda lost because all the fuses under dash and the hood check out ok... now the other day got in the truck and it kinda spazed out all the lights flashed like the 4 ways were on but every light except the dome lights light up.. illumination and head lights everything... im kinda stumped hoping i dont have to pull the dash and start chasing wires around im a descent wrench and electrical is my favorite but i dont know were to start all fuses are good

SOURCE: obd 2 connector does not work with any code scanner

HI there....Check to see if the code reader is a CAN OBD 2 code reader. If it is only OBD2 , that may be the problem. In 2003 Some vehicle manufacturers ( ford,Gm,Mazda and Saab) began using a new computer protocol called Controller Area Network (CAN) with the OBD2 and if your vehicle is CAN OBD 2 the simple OBD2 code reader will not work.Contact your local dealer to determine if you vehicle is CAN or not or find a code reader that is CAN OBD2 capable. Hope this helps you out

SOURCE: Tail lights don't work on 1998 Chevy Silverado.

check the wiring from the tailights back to the fuse panel, it sounds like an open connection. if i recall correctly check under the dash on the drivers side near the fuse panel for a bunch of wires in a bundle and look carefully for a wire or two that are cut/shorted/or seperated, you can also check under the drivers side kick panel by the hood release.

SOURCE: dash lights and tail light not working

Head light Switch Most likley

SOURCE: clock, and dome light (2004 aveo)

If the fuse blows when you start the car their is a bare wire somewhere in the wiring system that is grounding out when power goes through the system. Thier is a possibility of it being something else that is on the same fuse. You will have to trace the wires to find out what and where it is exposed. Your switches should be tested also. The switch that turns the light on manually and the one located in the door jam itself that turns the light on when opening the door. You should bring your car to a mechanic who is qualified in electrical dianosis. I hope this helped you out. good luck..... It would be appreciatted if you could rate my answer. tThanks....MIKE-

SOURCE: tail lights and dash lights in 98 Silverado don't work

same prob with my 98 gmc sierra, is your air bag light and security light on on your dash?