Does anyone know what this plug/box is on my 87 GV? It's been unplugged since I purchased tbe rig and don't known if it was intentional or not
Maybe that is the headlight relay that you were asking about. It has the correct number of pins, like in the picture.
I don't think so. The lights work with or without that harness plugged in and the wires come out of the headlight switch and don't go anywhere near it.
If it was me, I'd plug it in and see what happens.
Might be related to the ICC dip switch .