Regarding your comment - a rear fog is out though, so that might be why
The fogs are not in the BFWS, only paired circuits are the tail lights, brake lights, and low beam headlights. Others are "normal". Something on a paired circuit is lighting the Bulb Out warning.
On 240s, rear fog lights became standard when the 3rd brake light came in 1986
That year, and up to 1990 (I think) there was a fog light on both sides. Then some law/rule/regulation came along and said "Some driver may mistake fog lights for brake lights, so remove one." Thus later 240's have only the left side.
In fact, my 1997 965 has the lens, but the lamp unit is not even cut out to receive a bulb holder.
If your rear fog lights are out, here's what I did. The left tail light connector has two white wires. One brings power from up front, the other takes power over to the right hand side. To find out which is which I used a voltmeter.
Both those little pincers inside the connector touch the same piece of copper foil on the circuit board. Under the pincer from up front the contact point gets oxidized and maybe burnt, resulting in no fog lights.
The connector can be opened up (look for the hinge along one side) and the two pincers swapped. That way you will get a left light, probably not a right light. BTW the same patch can be used for back-up lights, they use black wires.
Good Luck,
Bob
:>)
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