head light swith or dimmer?

[ebeeman]

my 97 tahoe head ligts quit. i still have day time lights and running lights, but lose everything with head lamps on. also no dimmer or brights, is it the head lamp switch or dimmer switch?

[AgentBman]

Any information would be helpful. thanks!

[010175]

does you tail light work? There is a black relay under the dash to the right side of steering colom. If its bad the headlights or taillights will not work.

[AgentBman]

Tail lights do work. Can both low beams go out at once?