Main dipped headlights not working

My understanding was that you had no low (dipped) beam, but your high (main) was working. That is why we were steering you towards the dipper switch. Now as I reread the whole thread, I think I understand that you have no headlights at all.
Based on your other descriptions, it does sound like you might have multiple problems. I think you would do well to ask around and find somebody that has some skills with electricity, and using a voltage meter to trace out your circuits. Make sure you have the printouts of the wiring diagrams And it might help to go to a print shop and have them enlarged.
Because you have problems on multiple circuits, and you have bypassed the amp gauge, you may have disrupted something on the main welded splice that 67Dart273 wrote of.