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Dear Jon,
Hope you're well. The overload protection relay (with a 10 Amp fuse mounted on top) after the 1993 model years cars, was not used in 940s and 960s sold in North American markets. I checked Volvo VADIS - the superseded dealer parts/service database - and the overload protection relay (#1363569) does not appear to have been used after 1993.
You should check fuse #12 with a test meter. It may have failed inobviously. Replace the fuse and see if that helps matters.
Also, check the fuse-holder for corrosion. Sometimes, a layer of corrosion only a few atoms thick suffices to break a circuit. A corrosion layer so thin cannot be seen with the unaided eye - and may not even be obvious using a standard microscope.
You can use an aerosal oxidation remover to clean the fuse panel's contacts. Very fine sandpaper can also be used.
Does the speedometer work correctly? If not, the signal may have been lost. This signal comes from a sensor - mounted in the differential's cover - which also supplies the ABS system. Inspect the wiring from the differential's sensor. If the wiring has been damaged, that may account for the ABS system malfunction light.
Sometimes, it takes multiple battery disconnects - and a wait of 10-15 minutes in between - to reset a malfunctioning device.
Hope this helps.
Yours faithfully,
Spook
YIour
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