whats this wire/plug coming from under the fuse panel

[quattro4]

86 carrera - wondering what this plug is?

[gerakroo]

I think this is the weco connector for the optional "zusatz reinigungs pump" option M286

[GH85Carrera]

On my 85 that powers the trunk light, glove box light, dome lights and the clock. I disconnect it when working either the trunk lid open to avoid battery drain.

[quattro4]

thanks! definitely don't have the "zusatz reinigungs pump" so good suggestion.
All my lights seem to work so it's not the trunk/glove box/dome lights suggestion.

[targa80]

What year is your car?
From the photo the wire looks like it is red with white stripe.

If it is a red/white (re/wt) wire the 1981 schematic calls out a one pole connector (T1D) that is located behind fuse panel. The T1D connector mates a single re/wt wire from OXY relay terminal 86 to fuel pump relay single rd/wt wire terminal 30. T1D also connects single re/wt wire to pin 10 on T14 located on regulator panel. This re/wt wire connects to the warm up regulator and supplementary air valve.

Naturally there are many other re/wt wires in the schematics but this is the one near the fuse panel with a single polar terminal connector.

Hope it helps