I checked the continuity from L1 to L6 pulling the switch in and out, nothing to headlights. I am thinking of opening up the harness to check the welded splices for the low voltage, what do you think? Thanks
You are on the wrong track. L1 is headlights ONLY power. It does nothing else, and is a completly separate circuit for the headlights, which is B1 on the switch.
L6 is the power from P on the switch feeding the park lights. It gets power from B2 which comes from the fuse panel, that is wire L8
L8/ B2 feeds park, tail, and instrument lamps. L8 junctions there at the stop lamp switch, that terminal is nothing more than a branch, and so the wire from the stoplamp switch continues over to the fuse panel.
