1998 Buick Century Custom Turn Signal Problem

Currently I have a 1998 Buick Century Custom having turn signal issues.

The front left blinker is not blinking. Understandably, with this malfunction, the rear left blinker blinks rapidly when the turn signal switch is in the left turn signal position. However, when I put the hazard lights on, BOTH rear blinkers blink normally as does the front right blinker.

When the headlights are on, the amber-colored blinker bulb remains lit (left front).

The right side front and rear blinkers work great.

I have checked the fuses, replaced the bulb and cleaned the socket of the front left blinker and still have no results. While my next guess would be that the flasher unit is the problem, I don’t believe the rear, or front right blinkers would blink if that was the problem.

Does anyone have any advice? It would be much appreciated.


Sound so me as though you have a ground problem on the front left blinker socket…You can prove this out by providing the (Known good) bulb with its own external ground wire. That front left bulb should be a dual filament bulb so it is possible that one filament will work and then when you need the brighter filament to turn on…it cant bec of no ground. Its pretty easy to fab up and do the test… Hell you can even just cut a length of speaker wire and ground one end to the body…or splice it in with the ground of the other sides bulb…and attach the other enf to the body of the light bulb socket of the left blinker… Give it a shot. Let me know if you need more advice on how to do it


I have this exact same problem on my 98 Buick century. Had anyone determined what the fix is? I’m not too great with solving electrical problems.

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You replied to a 9 year old post where the original poster never posted back. That little date in the upper right tells you when the last post is.

You would get more response if you would start a new thread.

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