at wit's end - windows don't work

[Livolsi, Stephane]

I'm at the end of my rope, goodbye cruel world.......

patient is 1986 5ktq

Last fall the power windows stopped working.  Sure enough, some wires were
broken where they pass through the door.  Fixed the broken ones and had
power windows again.

A couple weeks later, they stopped working again (not from any of the
switches), and also the sunroof would not work at all - DMM check confirms
no power, but a check of the wiring shows none broken.

I need some help confirming some things:

According to Haynes wiring diagrams, the wire that supplies power to the
switches in the driver's door is brown.  Is this correct?
If it is, that is probably my problem, because not only do I NOT have 12 v,
it is actually grounded.  I (gulp) cut the wire at the door (it was terribly
frayed anyway and would need fixing) and checked for ground.  It is grounded
on the supply side (going under the dash).
Any ideas where this could have gone wrong?

My aux relay panel has 2 slots for window relays - 1 labeled 'power window
regulator (wind down)', and the other is labeled 'control unit for power
windows and sunroof', but there is nothing, not even a relay receptacle in
the slot for #2.  But, I had windows and sunroof working before.

The first relay has a 10 amp fuse in it and it is good.  With the ignition
off, and the relay out, I can hear the relay click on when I push it in.  Is
this normal, or should it be off until a window button is pressed?

Hoping someone has some insight.....

Stephane