Both Low beam headlights aren't working in my 2002

I would check to make sure they are not burnt out, Then check my fuses, then check my switch.. It is a matter of elimination

If the high beams work check the bulbs the low beam felament maybe blown
Did they both stop working at same time if so check power at head lamp sw.

Try changing the bulbs. No. They didn't both burn out at once. You probably drove for a while with one headlight, and didn't know it.

Yes, there is a fuse for low beam. Should be under the hood.

Are these automatic headlights?

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.

I need to rewire the headlights for a 2004 Chevrolet trailblazer ss. Got the high beams ok but can't figure out where the wires are for the low beam/running lights Where are they?

Check your dimmer switch on your steering column. Your plug may be loose or not getting a good connection. Your dimmer switch may be going bad as well. The same thing happened on my 1994 Chevy, but the lights never came back on, on mine. I found that the dimmer switch had gone bad. If this is the case, I recommend buying one from your local chevy dealer and spending the extra money. I went through two that I bought through napa before buying a OEM replacement because the napa ones just didn't last.

You could remove the air filter cover and then you will be able to reach the bulb.