C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Smoke from Steering Column

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Old Mar 21, 2020 | 10:11 AM
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Default Smoke from Steering Column

Twice, now, I have had smoke come from the steering column of my 200,000+ miles, driven most everyday, '89, 6-speed, convertible. After the first, I removed the entire column, mostly disassembled, and found nothing. I replaced the turn indicator switch, ignition switch, and bright/dim switch. Yesterday, the car cranked, but acted as though it wasn't getting enough gas to accelerate. Pulled back in garage, and smoke came out of column near turn indicator switch. Any suggestions?
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Old Mar 21, 2020 | 11:47 AM
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Possibly excessive grease on turn signal switch or a chaff. I would disable top of column take a peek. You did re-install harness protectors?
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Old Mar 21, 2020 | 11:56 AM
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I cleaned everything, when I had it apart the first time. I had suspected a short, but saw nothing "rubbed" or missing insulation. The engine hesitation this time is/maybe related.

Harness protectors??? I put everything back that came out.
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Old Mar 21, 2020 | 02:04 PM
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Might be a switch on it's way out.
I had my original headlight switch just about catch fire.
There were a few warning signs before I got the big smoke.
it ended up melting the switch pretty good, and melted about 3 inches of the insulation on the main power wire going to the switch.

Found out that my 84 has the fog lights and the headlights going through the same switch, no relay.
Later cars they fixed that...

Fun of old cars!


ETA: try pay close attention to where the smoke comes from if it happens again.
Might be time for a new ign switch in the end.

Last edited by Gibbles; Mar 21, 2020 at 02:06 PM.
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Old Mar 21, 2020 | 04:29 PM
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Harness protectors??? I put everything back that came out.[/QUOTE]

There are atleast 2
1 large one slides in from the bottom, lugs on lower housing locate it. T.S. and wiper harnesses run through it. Cruise wire has a sleeve on some models attaches to it.
The other is "shaped" and fits where wiring runs past pivot area towards base of column.
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Old Mar 21, 2020 | 10:37 PM
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I'll have to look.
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