2004 chevy impala no headlights

relay has gone, hand flash is direct switch. main is relay. remove the cover on dash in doorway side information is on the panel when open, headlight relay is the part. drivers side.

Fuses are good, replace the turnsignal switch. All the exterior lights run threw it.

There are right and left fuses for the headlights. The dimmer switch and headlight switch provide the ground circuit.
Do you have power at the fuse ?

The basic problem is too much resistance in a circuit.
You have to figure out which one and where the resistance or short is.
You can take the fuses out one at a time or all at once to see which circuit is pulling too much current.
It could be a faulty ground somewhere and the lights are grounding thru the wrong circuit. Or something shorted together and pulling current thru the wrong circuit. Like the headlights running off the dash light circuit.
You may need a book with wiring diagrams to know what to check.

Park lamp relay contacts maybe stuck closed .
Body Wiring Harness Junction Block
Under the left side of the instrument panel near the left kick panel

There are relays for the head lights,but see if the bright lights work also,the bulbs maybe blown,not uncommon for both to blow,then there is the headlight switch,if the brights do not work,it is most likely the headlight switch giving the problem.

The Daytime running lights are controlled by a relay under the hood that says "DRL"

I would just pull the relay and not worry about it. daytime running lights are just an annoyance.

There should be a reset button in the fuse pannel. It can be used to reset the low tire pressure light , and the change oil light.
Instructions should be in owners manual , or you can google it.
Chevy dealership should do it for free in my opinion.

It sounds like your low headlight relay may not be working. not sure on this particular model, but most of them have relays for high and low beam headlamps. these are usually located in the power distribution panel under the hood. before replacing make sure you have power to them. if not check for wiring problem, if power is present try a different relay.

Ok, locate the relay panel (probably inder the hood) and find the relay that controls the headlamps. With your headlight switch "on", pull the relay and see if your getting a hot current to the connectors in the relay panel. If it's hot, replace the relay. If no current, it's probably your headlight switch.