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Home >> Cadillac >> 1993 >> Allante >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Self-Diagnostic System >> Pcm Input Displays >> PI89: Stoplight Switch
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PI89: Stoplight Switch

Stop Lamp Switch contacts of the Stop/BTSI/Cruise Brake Switch. This input comes to the PCM through the data link from the EBTCM. PI89 should be "LO" with the brake pedal released and "HI" with the brake pedal depressed.

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