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Old 11-15-2010, 10:48 AM
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1986 Camaro Turn Signals

I had the situation where the turn signals would not work with headlights on and instrument panel lights on.
Turn the instrument panel lights off turn signals work.
The printed circuit on the back of the instrument panel was pretty much used up so I replaced it, with one that had itīs own issues.
Replaced it again.
Now Iīm okay insofar I have turn signals, instrument panel lights working as well.
But, while the left turn signal blinks as it should, the right however you could time with a calendar.
Anyone know where to look next to get it up and running like the other ?

Tip, if you have one of these cars, where the printed circuit folds under the instrument pod, tape it with duct tape, any removal or reinstallation of the pod wears it out quick.

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Old 11-15-2010, 11:20 AM
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I recall working on a 68 Camaro that had a similar problem after installing a Painless wiring kit under the dash. It sounds like a couple of things and this is what we did to fix it. We replaced the relays near the fuse box which control the flashers (two of them). You may have an issue with lack of a good ground connection. On all the ground connections we used the star type lock washers to get a good bite on the metal. We also had an issue with the rear taillight and bulb socket not being grounded so we pulled that and cleaned all the contacts there and replaced the bulb as well. I believe the turn signals are connected with the brake lights/ taillights so if the ground is not proper at the taillights it can affect the signals as well. Is the right side blinker dimmer than the left side when on? Not sure what the actual cause was, but it worked fine after we did all that. Hope this helps. I remember the Camaro had a tilt column and ground issues were common with those. Maybe check the ground connections there as well. Hope this helps.

Last edited by kleen56; 11-15-2010 at 11:27 AM.
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Old 11-15-2010, 02:10 PM
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I have replaced the relays with new ones and ground tested the rear right bulb.
Funny thing on both sides at the rear, the turn signal bulb socket takes a stop/tail bulb no other will go in there, it reqiuires the bulb to have staggered pins.
Both sides flash with the same brightness.


The carīs wiring harness is original and there is a lot of gunge in the sockets at the rear, presumably to seal them, wondering if I should clean it all out.
Oddly both sides flash with the same tempo when I set the hazards going.
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Old 11-15-2010, 06:07 PM
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That socket looks pretty bad and could be part of the problem. I would get new ones from the auto parts and get rid of those corroded ones. As far as the emergency blinkers, I believe that is a different circuit and not tied into the taillights, brakes, etc. You may want to check the brake switch as well as that is tied into with the flasher units along with the signal switch itself at the steering wheel. Sometimes those contacts don't make a good connection. Otherwise, I'm at a loss I hate electical!
Ed
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Old 11-15-2010, 06:35 PM
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OK let me see if I got this straight.
Hazard flashers work OK. bulbs are exactly the same brightness and flash at the same rate. No change with the parking lights on or off.

Left turn signal works OK but the right side flashes very slowly.
Referring to the attached diagram you will see that the hazard flashers are controlled through the turn signal switch.

It appears that the problem is the turn signal switch if the above is correct.

What is referred to in this thread as relays must be the turn signal and hazard flashers.

I like electrical.

vicrod
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File Type: pdf gm turnsignals.pdf (55.2 KB, 63 views)
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Old 11-15-2010, 10:56 PM
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Okay thanks guys, Iīll go to the turn signal switch next.

The bulb socket is not corroded, itīs full of some kind of grease,
all the tailight sockets are the same.
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Old 11-16-2010, 06:48 AM
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Today I disassembled the steering column and removed the turn signal switch.
The left turn contact was pretty grubby so I cleaned it to sparklinī.
While I was in there I swapped out the worn ignition switch barrel for a new one.
The left turn signals are faster than before and just a tad slower than the right side.
Itīll be okay now to get me past the yearly inspection.
The only sweat I worked up was making this to press the steering shaft lock ring down to remove the retaining ring.

You donīt need the special tool recommended by Haynes, this uses the existing steering wheel nut.

Thanks for the input guys.
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