This is my 2nd successful fix, 1st was on a 96 850, same as 98 V70
The two 12v supply solder joints on the circuit board in the ABS control box needed to be resoldered. Also a corner joint off the multi pin conector was cracked too. Use good light and mag glass
You have to remove the box, crack it open and look at the joints....you will see a crack. Silicon the box back up and reconnect.
Always disconnect battery, remove air box 1st for access. Little torx driver needed or small hex drive worked to. Careful not to slice you hands when breaking the rim/lip of the box off
Rob
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