Section 5 (Anti-Lock Brake System): Fuses
WARNING: This page is about a different car, the 1990 Volvo 760 and 1990 Volvo 740. However, it is still accessible from the selected car via links, so may be relevant.
On 740 Series, check fuses No. 9 and No. 10. On 760 Series, check fuses No. 21, 22 and 23. On 740 and 760 Series, check 80-amp fuse at top of right side wheelwell. Check 10-amp transient surge protector fuse, mounted on bracket near ECU.