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Home >> Sterling >> 1988 >> 825 SL, 2.5 D >> Repair and Diagnosis >> Brakes >> Traction Control >> Anti-Lock Brake System >> Testing >> Wheel Sensor Tests >> Left Rear Wheel Sensor Insulator

Left Rear Wheel Sensor Insulator

  1. Place wheel sensor selector switch to "4" position. Turn wheel sensor switch to "Rear L". If wheel sensor LED light illuminates, go to next test. If LED light does not illuminate, using a DVOM, check resistance between ECU harness connector pins No. 7 and 9 to ground at each Green wire.
  2. If resistance is more than 100,000 ohms, insulation is okay. If resistance is less than 100,000 ohms at either wire, unplug left rear wheel sensor connector. Check resistance between each wheel sensor terminal and ground.
  3. If resistance at either terminal is less than 100,000 ohms, replace wheel sensor. If resistance at both terminals was more than 100,000 ohms, check damaged wiring between wheel sensor and ECU.
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