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1993 Pontiac Grand Prix Question: What causes non-function brake lights, other than fuses, bulbs,switch?
Answer #1pushrod August 21, 2013, 09:16Master
Signal light switch! Yes, signal light switch. Brake light circuit passes through this switch before it goes to the rear lights. Signals work fine but brake lights inop. Common problem! Alsoo called the multifunction switch.
Replydandy dave, August 21, 2013, 09:29Rookie
The multi - purpose lever failed quite some time ago. It was placed with just a standard turn-signal lever. As you stated, turn signals work fine. Is this signal light switch enclosed within the steering column?
Replypushrod, August 21, 2013, 09:35Master
Yes, just behind the steering wheel. 93 may have just the turn signal switch there but is still the most likely suspect if brake light switch and fuses are ok! Since the signal lights work, the wiring and bulbs should be ok as well!
Replydandy dave, August 21, 2013, 09:55Rookie
Replypushrod, August 21, 2013, 14:09Master
You bet! Post results so others may benefit.