'70 GT6, I have put in new harness and new master lt. switch, the wires going to the col. dim switch are blue, 2blue white, blue/red, purple/black. I ordered a used col. switch and it has brown, blue/red 1blue/white, brown/red;the wires on master lt. switch blue, red/green, brown, all the running lts. and blinkers work but no main beams, the horn blows when clicking on lt. switch. I have tried every possible combo on wires still the same. Owners manual does not show same wires for col. switch. Wife is getting madder by the day. Help