98 blazer when i turn my lights on (not daytime) the tail lights go on dash lights up but headlights do not turn on

Fault tracing needed;
Test for power
1-To headlamp switch
2-Out headlamp switch w/park and/or headlamps requested on...

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I would suspect the wiring to the headlight switch is melted. Take the panel off and look where the plug goes onto the switch.

did you check your fuse for the headlights the daytime lights are probaly on there own circut

If you have daytime running lights but when you turn on your regular headlight on they do not come on. Take the bottom of your steering column off (Two Small Screws) and look at the back of your turn/dimmer switch make sure that the light blue wire is connected. The wires will break off after years of raising and lowering your steering column.

I would check your headlight relay switch that is located in your steering colum

Dash lights were falsing ? I assume you mean pulsing .
driving lights come on ? daytime running lights or park lamps ,does the vehicle have daytime running lamps . Daytime running lamps module .
Daytime Running Lamps (DRL) Module (Headlamp Auto Control Module)
Mounted behind the radio and the HVAC control, left of the instrument panel compartment.

disconnect head lights, and replace fuse. Then turn the light back on to see if it blow a fuse again. if not, plug on light in at a time. You might have a bad headlight???? then unplug that one if nothing happens. Then plug the other one in. It could also be a bad taillight bulb. I have had bad tail light bulbs. Do all of them, one at a time.

perhaps i missed something here... lowbeams and daytime lights are about the same.... be that as it may... the merely obvious thing is that the low beams are burnt out.... next thing would be that the relay for the day time lights could be defective... it's often mounted on the firewall.

Robert

DRL (Daytime Running Lights) will come on any time you start your car.
The dash lights do not come on, unless your headlights turn on. Either by a daylight sensor or if you manually turn them on by the switch.
So even though your headlights are on with the DRL, if you notice the tail lights do not come on (just like the dash lights don't).

To test if your dash lights do work, turn your headlight switch on. You should the the tail lights and dash lights come on.

I belive those run on seperate fuses. If those are good, under the dash and under the hood, I'ld suspect it's the headlight switch.