Bodge fix if it is dry solder joints, try wedging something in between the electrical connector and the body of the ABS pump, it may help hold the contacts together inside the ABS control unit. It's only a temporary fix but when mine was playing up it meant I went from a couple of ABS warnings a day to a couple of weeks without a warning, when I did take the unit apart it did have 'dry' solder joints.
The picture shows where, I just used a bit of card from a box of sweets.
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David
V70 2.5 10v Torslanda Manual 98 Sreg
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