Speed Switch (CALIF. Auto. Trans. GLC Only)

Remove instrument cluster from dash. Remove speedometer glass and connect test lamp. See Fig 1. With speedometer needle pointing at speeds lower than 43-47 MPH, lamp should glow. Above the pre-determined speed, bulb should not glow. Replace speed switch if defective.

Fig 1: Schematic for Testing Speed Switch (Calif. Auto. Trans. GLC Only)

Courtesy of MAZDA MOTORS CORP.