Pass rear blinker no workie.
No continuity from fuse 6 to red/Grey wire at rear light box.
Am I reading the wire diagram correctly?
If so, how to fix?
Thinking of pulling a new wire using scotch locks near the fuse and in the trunk.
Whatcha think?

Rarely will it be the actual wire that is causing the problem. You need to check connections for corrosion or bad connections. On a fifty year old car that is the weak link to start with. Scotch locks are a poor wire repair, yes they will work but not a very good connection.

WAG, do you have the correct bulb installed?

When I look at the Diagram fuse 6 is for the parking lights, fuse 9 is for the stop, turn and back up lights. Assuming you are working on a 1972.

This

All connections are surgically clean.
Had a mouse nest in the tunnel so thunk maybe a critter chewed through a wire.

I will check the FLAPS on my way home.
My lense gasket isnt the best, maybe that's how it all leaked out?

That might explain why I cannot figure this out!
Fuse 6 said it want to "clearance lamps"
No idea what that is, but somewhere else I saw "clearance lamps / blinkers"

Yup you are right.
My RR parking light doesn't either!
So LR, LF and RF work.
Going to pull the Hazzard switch and check continuity.

The most appropriate use for Scotch Locks is holding down the bottom of your garbage can. They cause more problems than they fix. If you ever find yourself attempting to use one, just hit your hand with a hammer and shout "NOOO!" at the top of your lungs.

--DD (Why, yes, I don't like them. Why do you ask? )

You KNEW that was coming.... Only took a little over 24hrs....