Another electrical gremlins revealed itself.

I had wondered why the positive battery cable aux wire had been routed directly to the alternator. It doesn't seem to be a high amp alternator, so I figured it had been done by someone who doesn't fully understand the charging system.

Anyway I decided to use the aux wire for the battery tender plug, which I routed to the lower air duct and zip tied to the frame horn.

Then I found out why they did it: I had no power without it!

I know the harness gets power from the starter, so something must be amiss there, my guess is a fusible link. I hate those things. Some time back I read an explanation on how in some subtle way they are better than a fuse, but I forget the why.

Attempting to reset the proportioning valve was in vain. So I have a new one on order. Getting a factory correct part would be limited to a used one, apparently why it was ghd one thing in the brake system not replaced.