Cusser
+1y
Hmmm - I wired my new cassette stereo in back in 1994, soon after buying my '88.
I soldered the wiring harness in to the existing wires, stripped off some insulation and soldered the new wires to the existing ones. I believe that I did run a new yellow wire back to an "always hot" wire in the fuse box, and ran that wire under/through the dash over to the radio opening, wasn't difficult. You'll need the red "switched on" positive wire as well. I used one of the stereo mounts and ran a black ground wire directly to a B2200 frame metal screw that was close by.
I'm a pretty big believer in the installation kits for the stereos, I got one for the console, and a wiring one, for both my Frontiers and daughter's Pathfinder. I got just a console kit for the B200 then. Autozone or Metra online.