The car is a 1989 740 TDI station wagon. Since a few weeks I feel that the ABS engages also on dry surface during the very last time just before standstill on dry surface. It does not interfere with braking at all. I haven´t touched anything yet. My Haynes manual is not helpful with this problem. Any idea what I could do myself for diagnosis? Any website with info on troubleshooting?
ABS on 740 -89 engages before standstill
Aug 15, 2004
2 Replies
This is usually caused by excessive resistance in one or both connectors for the the front wheel sensors. Volvo provides wire harness connector pigtails that can be soldered in to replace the harness side of the connector. It's possible that the rear sensor wires were damaged during manufacture and have corroded inside the insulation to the point where there are only one or two strands of conducting wire left. Change all six wire ends and the problem should go away.
Bob
Thank You for the hint. You are talking of six wire ends ? 2 on the each front wheel and 2 on the wire to the back axle?
Viktor, Vienna, Austria
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