07/16/2026
This customer came to us for a second opinion after a dealership told them that their all wheel drive Ford Fusion was going to need a complete rear differential assembly, to the tune of a few thousand dollars, to repair their ABS related issue.
Initial inspection revealed some of the worst wiring repair/overlay that I’ve personally ever seen. A strand of wire duct taped to the bottom of the car and tied in with butt connectors that were never heat shrinked. The wire that was replaced still tested ok so I’m not sure what they were trying to accomplish.
I restored both ends of the wiring back to the factory harness and properly installed a new connector. Once we resolved that issue, we were then able to identify an erratic signal from the left rear wheel speed sensor which also set fault codes for the rear differential.
Once the wheel bearing was removed for inspection we found this dent in the tone ring which is where the wheel speed sensor picks up its reading for the ABS module. The dent, interfered with that signal causing the fault codes.
A differential would have never resolved this issue.
One new wheel bearing installed and another happy customer!!