Hope some one can help me with an electrical problem. When I turn on the headlights I have no low beams, high beams work fine and all 4 headlights light. On low beam I have tested the plug at the headlamp and the hot side shows power, but when I plug in into the lamp, nothing. Could it be the ground in the low beam is bad and when the high beams are on it's sharing the ground from it? I replaced the switch in the dash but the problem is still there.

isnt the dimmer switch on the column, like pull the signal back?

In the front of your car somewhere along the wiring harnes close to where it meets the headlights is several ground wires that are attached to the chassis with a small bolt thats probably not doing anything else but holding that wire on..
Check that out, if you cannot find it, splice the ground of ONE of the primary (not hibeam) headlamp plugs and ground it to the chassis. That will eliminate the situation as long as there is voltage coming down the red wire of the harness when you activate the lobeam lights.

DO NOT connect the ground wires from the hibeams to the lowbeams.
Get the lobeams their own ground..
I forgot to put this in the post..
The hibeams might come on very dim if you do that.