I have a 1992 Dodge Truck with a Cummins in it. The head lights went out in it the other day, but I still had marker and running lights. I purchased a new head light switch and installed it but now not only do I not have head lights but I have no running or marker lights. The warning buzzer comes on when the switch is pulled out also. I have a wiring diagram but I does show the light switch for some reason. I guess may first question would be is there a web site I can go to and find a wiring diagram, hopfully with a light switch. :confused:

Did you check any of the fuses prior to or after replacing the head light switch?