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: 2004 chve trailblazer tell me how can i chinge
you need to remove the grill, a small flat head screw driver will do the trick, you will need to push down on the clips under the hood and pull lightly from the head light assembly and grill just comes off. Then you will need to pull up the two clips on the top corners of the head light assembly. this will free up the assembly this way you can easily remove the bulb and replace it.
SOURCE: Low Beam headlights not working
The daytime running lights run the high beam bulbs at low voltage so it sounds like you need to put the relays back where they were and either replace the low beam bulbs or repair the wiring to them.Also the relay you removed could be defective.
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