Technically it's a ground, but yes, that wire is where the signal is delivered from. The signal runs through the C326 plug into the top through the BK/WT wire, goes through the defroster on the window, and goes back through the C326 plug though the BK wire, and to ground.
Technically it's a ground, but yes, that wire is where the signal is delivered from. The signal runs through the C326 plug into the top through the BK/WT wire, goes through the defroster on the window, and goes back through the C326 plug though the BK wire, and to ground.