The stalk switch has only 2 contacts for the 4 fuses so if it was bad it
should affect the bulbs in sets of 2. You should pull the 4 fuses and
then measure the voltage on each side of the fuse holders with the key
on and headlights on, hi and lo. Then put the fuses back and measure
each again.

Mark

Cunegonde wrote:
> Thank you for the suggestion. Along with checking circuits of my new switch before install, I have repeatedly checked and tested all my fuses and fuse panel connections. First check I did, in fact. And 3rd, 5th...
>
>
> My current guesses are:
> Hidden wiring harness or harness connectors
> Bad fuse block/rail
> Steering column left stalk high beam switch (oh, please, no... Not removing the steering wheel again!)
>
>