couple days ago i had to replace my water pump and shortly after i realized that if i turn on my running lights they all come on, front corners and all the back lights, but as soon as i turn on my headlights they come on but all the other lights around my car and the dash lights shut off. the water pump was spraying a little bit of water up before getting replace but im not sure if that somehow caused a short or if this is something else. Any help would be much appreciated

 

still cant figure this issue out, ive gone over wiring and all i can think of but cant figure out whats going on. if anyone has any idea i could really use the help, thanks all.

 

That almost has to be the light switch, If it happens at only one corner of the car it could be a bad ground, but all around suggests the switch is cutting the power. Test switch with a meter or jump it. I think it's just coincidence you're having this problem about the same time as the water pump.