Wow, thanks so much Rolf!
I know the schematics show some GI fed by the brown wire, but all play field lighting is definitely fed by blue only. I think brown only feeds back box.
For some reason I am now getting 34V on the blue now instead of the ~60V.
DR: There appears to be only 1 blue wire. Everywhere it connects, it seems there is just a little insulation stripped and that bit of bare wire is the connection point. So everywhere there seems to be 2 blue wires, they seem to be the same wire.
I got the play field jones plugs off. I had already pulled a short length of gold chain from that area but could not get the screw that was also nearby. I had pushed the screw away, but could not remove. It's been bothering me, so I patiently/carefully pulled the jones. I got the screw out and found another screw and a broken bolt in a nut. None of those things seemed to be shorting anything, but at least now they are gone.
Readings with play field jones plugs disconnected:
(note: with meter attached to transformer common and probe not touching anything; I read 2V AC. I don't know why it does not read 0, but that may affect my readings)
At the fuse end with the blue wire I get 34V
At the blue wire on the play field I get 4V (even though jones are disconnected)
I checked other parts of the play field with the jones plugs disconnected and got low voltage readings there too.
I don't understand how I can be reading voltage from a play field that is disconnected, but again I am reading 2V on my meter even when connected to nothing but common lug on transformer and the probe touching nothing.
Once I reconnect the Jones plugs I get 34V on the blue play field wire again. So I think we can be sure the short is not on the play field.
The only place a wire bundle make a sharp turn, it is held by a plastic clamp. I don't see any abrasions and the blue wire is hidden in the bundle for most of it's length. I would have to dissect the bundle to follow the blue wire for the entire length.
Quoted from Dr_of_Style:Ok, I see whuts goin on here. the blue wires are the outgoing side of the fuse. that red/grey? wire feeding both 6volt fuses is the supply.
Exactly correct. Except those two blue wires are likely a single wire.
Wow, thanks for that. If I knew that to start I would have made less wrong turns. Now things make more sense!