Symptom "B" - One Or Both Rear Wheels Lock-Up
- If valve assembly failure is suspected, check for:
- Damaged valve assembly reset switch.
- Leaky dump valve.
- Hydraulically inoperative valve assembly.
- If speed sensor output low or loss at lower vehicle speeds is suspected, check for:
- Gap between speed sensor and sensor ring greater than 0.050" (1.27 mm).
- Speed sensor or speed sensor ring does not produce sufficient voltage (650 millivolts) output.
- If basic brake mechanical problem is suspected, check for:
- Brake related problems such as damp or contaminated rear brake linings, stuck or leaking wheel cylinder, or overadjusted rear brakes.
- Hung-up parking brake.
- Leaking rear axle seal.
- If a 4WD system mechanical/electrical problem is suspected, check for:
- Hubs engaged although shift lever is in 2WD position.
- Faulty 4WD indicator switch or short to battery voltage in 4WD circuit.
- If a vehicle electrical problem is suspected, check for:
- Brakelight input to control module missing.
- Brakelights inoperative.