lights??... maybe

[Suicide-D]

I have an interesting situation, as usual. I have been having a tailight,dashlight problem. I figured out what it was finally, the fuse wasn't blown but wasn't connected inside the glass very well so only made contact every once in a while. I replaced it and all was fine except now I don't have front running lights and my headlights don't work all the time. I turn them on and they are on but no parking lights... turn signals work. Then I turn them on at a later time and nothing... no headlights bright or dim and no running lights. Think it's a grounding issue? I replaced the headlight switch when I was having the other problem hoping that was it, so it's new. Oh and I replaced the heater core and discovered the headlight thing so my luck, the truck is one of those you can have this but not this things...daytime truck only...