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Brake assist lamp, basically part of the anti-lock brake and/or traction control system, wheel / axle / trans speed sensors, possible inertia sensors and more, track wheel rotation and through computer algorithm - try to detect abnormal wheel spin and/or braking. If you suspect an issue - these systems can be diagnosed via ODB-II connector and proper test equipment with software covering the applicable vehicle and sub-system.

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13y ago

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