HI,

I got your notification about your posting.
I guess your the cat that has set a trap for this mouse!

I went and looked up a diagram in one of a couple Hayes manuals I have.
Luckily or not, it has a diagram with 1980 thru 1983 models. It does leave "in" a disclaimer of saying this is "a typical" reference.

I can see your dilemma about this identification of what's, what?

There are blue/white wires (BL-W) coming out of the radio are BOTH to the left and right front speakers.

Both are with positive polarity signs on the framed box representing the radio, to the cars speaker wiring.
The same wiring colors are supposedly, split internally? I hope so?

Left front goes to a harness and which goes to Y-W and then to Y-GR probably at the door.
The right front does the same setup but uses Y-GR and goes all the way in that same color.
Guess you better have that one speaker on the right side of the car. (:)

The left front uses a plain white wire with its negative polarity sign notes.
The right front uses a blue or black (BL) with its negative polarity sign.
It is just printed (BL) and there is no legend to help us!
I have seen blue wires so dark that they can be considered black ... Maybe it's a test for color blindness?
You will notice that we are talking about light colored or pale wires!
At least in my past profession that was a backup thought, usually within control circuit cabinets. Pale dominates along with those stripes. Helps with indentifcation of Low current/voltage circuits.

Looking at the diagram;
What's interesting, is when connecting to the cars wiring it goes to a Green wiring that goes to speakers. In this case I would go with its a ground of speaker output.
Green is supposed to be for a "ground use only," in AC systems.
Cars are DC and its used for a ground too, but you will find anything can be as the manufacturer wants it to be or to use. Disclamer is, "subject to production changes" or translated "we ran out of that!"
Of course, there are those that cut and hack to just get power here and there with used cars!

We will go with this diagram, as it is only for a car with only front speakers as it stops there.
Cassettes were upper class to ditch big eight track continuous cassettes.
Power antenna is Red all the way to there. That might be fused?
GL cars had that hideaway feature, I imagine?
I have seen yellow wire for triggering of relays on them. Mostly from newer radios having consistent coloring doesn't mean squat! Tags are best!
B+ or battery input is BL again! I would think it would be fused, so, it shows a (SB)to a connector (10-1) of which is to the cars fuse panel. One being the fuse number. That's lovely!

A GN wire from the radio is shown +positive to "constant" power for clock and program memories.
That goes to (10-8) in the fuse panel.
That's if you radio is in that category.
A SB is shown as a chassis ground through a connector in the cars harness.
An ohmmeter can tell you what's a direct ground to the chassis, so you don't blow fuses.

That's all I have on diagrams and you might have the same thing.

Make and models of radios appear to be like plumbing fixtures and change constantly, of which, makes that trade an incredible frustrating one, for anyone willing to be twisting wrenches.
With the way they build dashes today, it's no wonder why you find hacking going on within used cars.

I will stick with my idea that you might be better off having an installer put it on a bench for a minute or two.
Buying a connector to match it up might be the easiest, since you apparently did not have the opportunity to disconnect the goodies in the car beforehand.

Hope this helps, as this got me on a long post again and not to get too lost from the diagrams.

Sorry Michael! (:)

Phil