I replaced the headlight switch, but that did not help. The running lights do not come on at all, even with the headlights on. 2 of the tail light bulbs are brand new, and the turn signals light when activated. I inspected the plug for the headlight switch when I replaced the switch, it looked good. Since then I have tried to wiggle the wires coming from the plug with no luck. Here is what happened when they stopped working, the head lights were flickering when the post on the switch was touched. While wiggling the post, the marker lights went out. I figured the switch was bad and replaced it. The headlights are now fine, but the marker lights still do not light.