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Home >> Porsche >> 1988 >> 928 Standard >> Repair and Diagnosis (Single Page) >> Brakes >> Traction Control >> Anti-Lock Brake System >> Testing >> Program Switch Position 18 >> Left Front Control Valve
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Left Front Control Valve

Press "VL" and "LED" buttons. Digital display should read between 1.9-2.3 amps. If readout is okay, go to RIGHT FRONT CONTROL VALVE test. If not, repeat test with engine running. If display is still not okay, replace control unit.