Thank again guys, I do appreciate it. Rather than trying something on Amazon (maybe several times) I think I will just bite the bullet and buy the Sylvania LEDs for $100 a pair. For you who don't have Interstates, I tell you it is no fun getting the bulbs in and out from under that fairing. Sometimes you get lucky and can do it in a few minutes, or sometimes it can take an hour or more, each.
Now for the rest of the story. New Honda light relays in hand, I went out and pulled both bikes out of the shed (the daily rider has to come out first, before the one against the wall will come out at all). The bike with no low beams had been against the wall since last August. Got it started yesterday, no problem.
Pulled the seat and side covers, got the radio out of the way and pulled the battery cover. Checked the 5 and 15 amp headlight fuses again, and they were fine again. Unbolted the coolant reservoir (and hose) and that thing is a real Rubics cube to finagle out of the frame. The bike is a permanent trunkless Interstate and there are several extra electrical boxes wired in there to make the taillight, signals and led plate light run-turn-brake, and they had to be moved out of the way too.
I keep my bikes spotless, but the wiring harness in there had 25 years of fine dust and crud everywhere, and it's not like you can take a power washer to it. I used soft brushes and swept it off the best I could (and should have worn a mask). Then I had the bright idea of using my Stihl gas blower (not wide open) to blow it off, and proceeded to cover both bikes with that dirty crud which stuck like glue. But at least I got a lot of the crud off the harness to see better to work.
The picture in the factory manual that shows both low and high beam relays, indicates the low beam relay is the very next unit ahead of the ECU. There was nothing there like in the picture, but I managed to wiggle the rubber suspension electrical box holder off it's clip and pull the box out enough to look it over, but none of the four wire colors to that box matched the wire colors that are supposed to be on the low beam relay. Another box was farther ahead and going to be very difficult to reach.
So I gave up and quit. A good man knows his limitations. I had already pulled and stretched all kinds of wiring in there, and I don't know what I'm doing. If I knew which box was the low beam relay I would have kept at it. I carefully put everything back where it was, and buttoned it all back up. Then I had to wipe that nasty crud off both bikes.
That bike runs fine, but had not been ridden since last August. So I rolled the other bike into the shed up against the wall, put on some gear and took the no low beam bike for an hour shakedown and that was the only good thing about the day, it ran like a champ (except the radio will now not come on, I probably caused that). I did not run those 100watt X 2 high beams, instead I ran the mini 70watt X 2 PIAAS under the fairing for headlights. I will take it to my expert mechanic who does know what he is doing and get it fixed.
Cruising up my street to home, I see my neighbor/friend HVAC man outside, and I stopped to thank him for all his help when my furnace went out a few weeks ago in 9 degrees. We talked for an hour about furnaces, filters, and motorcycles (he has a HOG). His wife came home and we said goodbye.
I go out to the street and get on my bike, and it is dead. It took me only a minute to realize, I had left those (separately switched) PIAAs on when I got off. I never use them, and they don't turn off like the headlights when you turn the key off. I am a big fat dummy. I cannot ask that man for (any more) help or a jump, so I push that fat bastard down the street 8 doors to my house, then UP my driveway through the gate, and coast it down my backyard driveway into the shed and on my charger. I only had to stop for a breather and rest 3 times, but it kicked my stupid ass.