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Home >> Cadillac >> 1994 >> Seville STS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 4.6L >> Diagnostic Parameters >> Pcm Specific Input Codes >> PI89: Stoplight Switch
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PI89: Stoplight Switch

This input comes through the data link from the EBTCM. PI89 should be LO with brake pedal released and HI with brake pedal depressed.

Fig 1: PCM Harness Connector ID
G94A32938Courtesy of GENERAL MOTORS CORP.
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