Anti-Lock Brake Safety Precautions

NEVER open a bleeder valve or loosen a hydraulic line while ABS is pressurized,
NEVER disconnect or reconnect any electrical connectors while ignition is on. Damage to ABS control unit may result.
Only use specially designed brake hoses/lines on ABS equipped vehicles.
DO NOT tap on speed sensor components (sensor, sensor rings). Speed rings must be pressed, NOT hammered into hubs. Striking these components can cause demagnetization or a loss of polarization, affecting the accuracy of the speed signal returning to the ABS control unit.
DO NOT mix tire sizes. Increasing the width, as long as tires remain close to the original diameter, is acceptable. Rolling diameter must be identical for all 4 tires (and spare tire also). Some manufacturers recommend tires of the same brand, style and type. Failure to follow this precaution may cause inaccurate wheel speed readings.
DO NOT contaminate speed sensor components with grease. Only use recommended anti-corrosion coating.
When speed sensor components have been removed, ALWAYS check sensor-to-ring gap when applicable. These specifications can be found in WHEEL SPEED SENSOR under ADJUSTMENTS.
ONLY use recommended brake fluids. DO NOT use silicone brake fluids in an ABS equipped vehicle.
When installing transmitting devices (CB's, telephones, ect.) on ABS equipped vehicles, DO NOT locate antenna near the ABS control unit or any control unit.
Disconnect all on-board computers when using electric welding equipment.
DO NOT expose the ABS control unit to prolonged periods of high heat (185°F/85°C for 2 hours is generally considered a maximum limit).

CAUTION: The ABS system is under extremely high pressure. Depressurize the brake system before loosening or removing any hydraulic component.