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Home >> Porsche >> 1990 >> 928 Standard >> Repair and Diagnosis >> Brakes >> Traction Control >> Anti-Lock Brake System >> Testing >> Program Switch Position 7 >> Ground Connection (Terminal 10)
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Ground Connection (Terminal 10)

  1. Press "LED" button. Digital display should be 300 mV. If display is okay, go to PROGRAM SWITCH POSITION 8  . If not, go to step 2).
  2. Check ground terminal No. 10 for excessive contact resistance or an open in wiring. Check wire for open from steering mount ground to disconnected control unit plug terminal No. 10. Repair or replace wiring as necessary and repeat test.
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