I have a 1998 Chevrolet K2500 that the headlights are not working correctly on. When I turn the headlights on nothing comes on unless I turn on the high beams, only the high beams are on, no low beams. If I turn the switch to the "parking" lights position then the low beams come on. I have tried replacing the headlight switch but it does the same thing. There are no blown fuses. Any ideas?

SOURCE: 1997 Chevrolet Headlight problem

We had the same exact symptoms right down to the clicking noise under the dash. A friend who is a mechanic provided all the wiring diagrams, etc and when we pulled the dash we found that there was another enclosure behind the dash.....we stopped there.......

....waited a few days, did some research and decided since a replacement headlight switch was about $50.00 the easiest route was to to swap that out hoping it would fix the problem....was also a very easy installation.

Turns out that fixed the problem. Good luck!!!

SOURCE: headlights wont come on, but parking lights work...i dont get it

Was sent in by another poster, just posting his results which fixed mine. Problem was relay $50.00 at GM only.

Check the relay module. 45 or 46. on the engine relay block. you can swap the two they are the same part number, then you will know. Dont start the engine, just check the lights. If it works replace the relay module. You may have to order the part from the parts store. Or go to the dealer to get it.

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: High Beams, parking lights work. Have NO low beam

had same problem had to replce whole turn signal switch

SOURCE: daytime running lights work but go out when I turn

Some of these vehicles do this from the factory. Read the owners manual section for daytime running lights.