the ground wire in my 1995 riv's driver door broke causing the window to stop.
i used the old wire to pull in a replacement.
the number of strands within the wire relates to how resistant the wire is re failure from flexing,
so i bought the best tinned wire from west marine.
it was necc to:
cut broken wire inside door and splice new wire to old wire
streamline the splice by soldering
cover splice with 2 layers of shrink tube,
pull old wire from inside passenger compartment to bring new wire through rubber boot
open door fully to allow rubber boot to have least restriction
lube the new wire with a common product used by electricians when pulling wire thru conduit
remove fuse panel above parking brake to get inside access.
rubber boot protects inner door and interior of car from ingress of water,spray, noise,
so do not injure said boot.