1999 S70 ABS/TRACS light on after resolder

[jlferreira]

A few weeks ago I started having the ABS/TRACS light on the dashboard (intermittent) and code ABS-0011 (Left front wheel sensor faulty signal).
After taking a look on the ABS repair topic I decided to open my module and do all the re-soldering work on it. I got all the pins re solder and the module reinstalled.
Now I have the lights on all the time and codes ABS-0011 and ABS-010 (LF wheel sensor missing signal).
I wonder if anyone had this issue before and what could it be next step to solve this. It seems that the sensors rarely fail so I think it could be some connection between the module and the sensor.
I hope to get this solve.

[jose456891]

First try to isolate the problem instead of making repairs.

I suggest tracing the transducer related wires from the ABS/TRACS commputer. Pay attention to ground wires going to the computer; sometimes funky things happen to microprocessors and transducers when they have a floating ground.

Salt water and cracks have someting in common when talking about wires, specially copper thin gauge wires: Corrosion. So check the resistance of the wires going to the senso. Also check the resistance of the transducer and compare to "normal" range in the service manual.

Switch the sensors; if all else fails. Swap one from the other side and see if the code changes.

last but not least, assume your ABS/TRACS faulty. These fail maily at the heavy gauge wire connection blade for the ABS motor. Recheck the blades that connect to the transducer. Again, confirm continuity of the traces relating to the transducer, and then solder as necessary.

My money is on bad wire going to/from the transducer.