Vehicle: 2007 Pontiac Grand Prix, 3.8L V-6,
Problem: The customer reported that the ABS
light was on. The brakes seemed to operate normally.
Details: Using his scan tool, the tech
pulled DTC C0035 (Left-front wheel speed sensor circuit issue).
First, he checked the left-front wheel speed sensor (WSS)
resistance at the sensor. It was within specifications (800-1600
ohms). Next, he checked the WSS resistance at the ABS control
module and the circuit was open. Moving to where the WSS wiring
harness passed over the suspension, he found the problem. A
previous repair had been made and was not done correctly.
Confirmed Repair: The tech repaired the
wiring by soldering the connection and using heat-shrink to
protect the connection. He also installed a new plastic harness
guide on the suspension to properly route the wires. The problem
was permanently fixed!