help, puzzled by the radio connector

[oldeskewltoy]

Check out the wiring manual.... it appears that you have an extra wire in your blue connector.... at least that is based on the 1986 USDM wiring manual (section 24, page 56-57)

The blue connector in the manual does not show a wire in the lower right slot(#9). The top three appear to be right, and the first three on the bottom appear to be right.

#1 = upper left in plug - LG wire color and goes to the rt front speaker #1 (of 2 connectors on speaker)
#2 = next to #1 - P wire color, and goes to lf front speaker #1 connector
#3 = still top row, other side of clip, GR is wire color comes from radio fuse No2(7.5 amp)
#5 = bottom left in plug, L is wire color and goes to #2 on rt front speaker
#6 = bottom row 2nd from left, V is wire color, goes to #2 on LH front speaker
#7 = bottom middle, W-B is wire color, goes to ground

There is no #9 in the USDM manual

You should also have a black plug, a bit smaller (5 wires instead of 9) those would be the rear speakers, and radio fuse #1 (10 amp)