Good news is I everything back together, the switch lever at the steering wheel seems to be working in position 4, 5, 6 and 7 o'clock BUT bad news, lights work at 4 (bright), 5 (no lights), 6 (off), 7 (parking--except only one parking light comes on (it worked before)). I've taken the switch housing apart probably 5 times now to look for loose connections and found nothing. What am I doing wrong?
Its actually sounding like the switch is properly sync'ed. So you're missing low beams (5) and part of parking (7)
It's gotta be in the connections.
Check the bullet ends of your wires where they plug into the plugs on the back/underneath of the housings. Repop harnesses have these "crimped on" connectors which are NOT the proper shape (they don't engage the plastic filler piece sufficiently to retain contact) and are wont to get corroded where they're crimp fastened to the wire.
One of the suppliers (that Harness guy in Rhode Island?) sells "machine turned" bullet ends which are original design and can replace the crummy crimped bullets by use of a soldering iron.
Yunno, the bullet ended/filler plastic/plug connector receptacle idea was NOT Henry's best. A lot of us for reliability of the headlights simply do away with the filler plastic and route the wires DIRECTLY into the headlight housing. Once inside, they cut the bulb socket harness and using solder connectors and shrink tubing make the electrical connection permanent - and functional.
Yes, I admit mine are set up like this - but I promise to change - truly...(contrition mode on.)
Once the headlight wire conduit is landed, the modification can't be detected - well, very hard anyway. And it makes the headlights MUCH more reliable. Well, that the theory based on the vagaries of metal to metal surface electrical contact, which the solder eliminates.
You can unplug the headlight conduits and check your electrical connections directly from the bullet ends to ground with a meter or another light bulb? Methinks it's probably OK?
Well, hoping this adds to your process of elimination.
Joe K