I verified that the DGN/R* is the horn wire.
Looking at the wiring diagrams, the BR wire for the washer pump should definitely be BR and 18-gauge all the way from the pump to the wiper switch's W terminal (I screwed that up in my diagram on the top of page 161). The washer circuit is labeled V10. What's weird is that the bulkhead diagram at the beginning of the wiring section of the FSM says that circuit is in Cavity 9. However, elsewhere in the diagrams there's another instance of the bulkhead connector configuration, showing Circuit V10 being in Cavity 24, while circuit P5--the brake warning switch circuit (which, coincidentally is a 20-gauge BK wire, and possibly where I made my "error") is in Cavity 9.
Now, it seems to me you had continuity between the BR wire at wiper-switch W and Cavity 24, which lends credence to the
second diagram. If your 18BR washer pump wire goes to that cavity on your new wiring harness, you're probably golden. Test between the pump end of the wire and the wire that goes into Cavity 24 on the new harness. I'm pretty sure it'll beep.
Just to be certain, test the engine side of Cavity 9 against the wire on your parking-brake pedal switch. If it doesn't beep, reverse the probes (there's a diode in that wire, so it'll only show continuity one way) and try again. If you have continuity there, then the
second diagram makes sense, along with your continuity between Cavity 24 and the washer terminal, and it's safe to say you'll be golden when you install the harness into the bulkhead.
I'm off to scavenge a part I think you're going to need.
