My son was back from his business trip and we were able to spend some time on his vehicle.
First, I finally sat down and got my head turned about a 1/4 turn to the right, after I finally realized that the color coding for the wires on this vehicle from the conventional american vehicles that I am used to working with. i.e. from a lighting situation, we effectively have a positive grounded vehicle in a manner of speaking. i.e. they color the ground wires with red colos and the color the voltage wires with browns and black.
This had given me issues when doing my initial trouble shooting because I would just automatically look for ground on the brown and black wires and voltage on the red colored wires. However, the opposite is true.
I went back to basics, as Cougar and others have suggested and just started from the beginning on the belief that I had missed something initially.
Have correct voltage at the output of fuse 6 and 7 which are the headlight fuses. But I DON't have voltage at the bulkhead pin, where the voltage is supposed to leave the fuse block.
So, it appears that there is an open circuit on the inside of the fuse block, between the output of pin 6 and the bulkhead connector of pin 6.
Furthermore, when I check the front wiring harness from the fuse block bulkhead connector over to the main connector on the front frame for the headlights, I find another open in that wire as well.
If this continues to check out, I am guessing that perhaps a wire got pinched or shorted out and burned open, and also did the same thing for the fuse block connector. The interesting thing about this situation is that it did not cause a fuse to fail.
Since we did not have another fuse block on hand, I installed a temporary wire from the + 12 volt battery terminal to a fused 15 amp wire over to the high beam + wire on the high beam headlight.
This fix temporarily took care of the lack of passenger side high beam light.
It also took care of the very dim low beam lights that were lighting up due to sneak currents passing backward through the high beam light bulbs.
However, there is still an issue on the low beams.
I have no drivers side or left side low beam light.
Also, the passengers side low beam light although much much brighter than what it was, but is still only about 1/2 brightness level.
Unfortunately, my son had to pack up and leave for now, so was unable to do any more voltage checking.
Since the fog, high beams on and off, I suspect that the light switch is all right but have another issue with the front wiring harness on the vehicle.
When more time allows, will continue the testing and checking