I bought new housings for my 2005 tahoe, when the new ones were installed the headlights did not come on. The next day my drl did not come on either, i bought new fuses and relays assuming that was the problem but it fixed nothing. Then I realized my drl come on when the fog light button is pressed but my fog lights don’t come on..?

 

Aftermarket housings?

 

yes they are aftermarket. but the ones I had on before were also aftermarket and I had no issue until i took them off.

 

Aftermarket stuff anything can happen. Who knows how they are internally wired.