Blinker issue
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From: New York
Car: 1989 Firebird Formula 350
Engine: 5.7
Transmission: 700R4
Axle/Gears: Stock
Blinker issue
I am getting my formula 350 back on the road ASAP. I am having an issue with the left blinker. It wont blink at all, no sound, no light, nothing. The right side is fine and hazards all around work fine as well. Could it be in the steering column or something else that would cause this? Thanks.
Re: Blinker issue
Hi. Has anything ever happened to the steering wheel? I have a hunch that it could be within the steering column. I am not 100% certain. But if all the lights work with the hazard, that is where my guess would go-to the turn signal switch. There is a circular contact for the signals. Not sure what they look like for your model. But the ones I have seen have a metal contact controlled by the lever. Does it make a sound or do you feel a detent when you use the left turn signal handle?
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Car: '91 Z28 convertible
Engine: TPI
Transmission: T5
Axle/Gears: 3.27 posi disc
Re: Blinker issue
Very likely the MF (multi-function) switch is the culprit.
You can verify by accessing the steering column and using a test light (or voltmeter) on the flat connector.

Check for power on the light blue and yellow wires with the left blinker engaged and ignition on. I assume you won't find any power which would point to the switch itself. Not an expensive part but a slightly involved replacement procedure.
Let ue know what you find.
Lou
You can verify by accessing the steering column and using a test light (or voltmeter) on the flat connector.

Check for power on the light blue and yellow wires with the left blinker engaged and ignition on. I assume you won't find any power which would point to the switch itself. Not an expensive part but a slightly involved replacement procedure.
Let ue know what you find.
Lou
Thread Starter
Supreme Member
iTrader: (3)
Joined: Jul 2005
Posts: 1,062
Likes: 71
From: New York
Car: 1989 Firebird Formula 350
Engine: 5.7
Transmission: 700R4
Axle/Gears: Stock
Re: Blinker issue
Very likely the MF (multi-function) switch is the culprit.
You can verify by accessing the steering column and using a test light (or voltmeter) on the flat connector.

Check for power on the light blue and yellow wires with the left blinker engaged and ignition on. I assume you won't find any power which would point to the switch itself. Not an expensive part but a slightly involved replacement procedure.
Let ue know what you find.
Lou
You can verify by accessing the steering column and using a test light (or voltmeter) on the flat connector.

Check for power on the light blue and yellow wires with the left blinker engaged and ignition on. I assume you won't find any power which would point to the switch itself. Not an expensive part but a slightly involved replacement procedure.
Let ue know what you find.
Lou
I pulled the steering wheel to check the cam and it was just build up on the contact. All is well.
Supreme Member
iTrader: (3)
Joined: Jul 2004
Posts: 2,989
Likes: 9
Car: '91 Z28 convertible
Engine: TPI
Transmission: T5
Axle/Gears: 3.27 posi disc
Re: Blinker issue
Hawkeye, thanks a lot for posting the resolution to your problem.
It will help others in the future who search and find your thread.
Thanks
Lou
It will help others in the future who search and find your thread.
Thanks
Lou
Thread Starter
Supreme Member
iTrader: (3)
Joined: Jul 2005
Posts: 1,062
Likes: 71
From: New York
Car: 1989 Firebird Formula 350
Engine: 5.7
Transmission: 700R4
Axle/Gears: Stock
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Thread Starter
Supreme Member
iTrader: (3)
Joined: Jul 2005
Posts: 1,062
Likes: 71
From: New York
Car: 1989 Firebird Formula 350
Engine: 5.7
Transmission: 700R4
Axle/Gears: Stock
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