All I can tell you is what I know about from my 1988 244 GL.

There is a connector on each of the tail ights. The harness connected to the left tail light contains all the wires for left and right side lights.

On the foil of the left tail light two of the contacts are double width. These are for the back-up lights and fog lights. On that double width spot are two connections, one from the front of the car, the other going to the right side tail light connector.

Thus there is no separate connector for the fog lights.

At some year after 1988 Volvo discontinued having two rear fog lights.

The harness to the left tail light from the front runs from a 9-pin connector that is located above the driver's left toe. It may be tucked down inside the wire channel that is there under the carpet.

That location is shown pretty clearly in the Volvo SErvice Manual Wiring Diagrams for 240 1987-88. If you intend to keep the car and do some of your own work, I highly recommend that book for your year. It contains the diagrams, using black, red and pink colors, that are copied into Haynes and Bentley.

Good Luck,

Bob

:>)

I've had questions like yours many times myself. But those diagrams are direct copies from fold-out summary diagrams in the Volvo wiring "green books". Some of those Volvo diagrams (I have the book for '87-'88) are pink-tinted, which may account for the blotchy reproductions in Bentley.

But AFAIK, not even the Volvo manuals identify the location of the in-line connector symbols shown in the diagrams.

Regarding your question, such a symbol is shown on p390-63 (Grid G-3), in line from the FL switch (128) and then branching to each taillight connector 147/7 (left) and 146/1 (right) for the two foglights (127). But it's Volvo who keeps that common connector's location a secret, not Bentley. If you ever find it, let us know, and that will be one at least.
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Bruce Young
'93 940-NA (current) — 240s (one V8) — 140s — 122s — since '63.