I had this problem last fall, and posted it, but now I can't find the thread.

Anyway, my turn signals weren't working right, so I did some checking and found that at least one bulb was burned out.

So for the cost and time , I decided to replace all the turn signal / hazard bulbs. A total of 10 bulbs.

 

Now I still have a problem, as follows:

1. left signal on- all the lights (that is front and back, left and right) are flashing.

2. right signal on- again all the lights are flashing, except the left front side marker. That one is out.

3. with the headlights on, left signal on- all the lights are on, but none are flashing.

4. again with the headlights on, right signal on- all the lights are on except the L.F. S. marker. Again, that one is out. Again, none are flashing.

5. With just the parking lights on, all are lit except L.F.S. marker.

6. With the parking lights on, the turn signals behave the same as when the headlights are on.

7. When I turn on the 4-way hazard flasher, they all flash except the front side markers, L & R.

8. With either the parking lights or the headlights on, and the 4-way on, all the lights are on, except for both front side markers. But none are flashing.

9. And finally, with all power off, when I hit the brake pedal, the brake lights come on, the dash lights come on and the warning buzzer sounds. Until I take my foot off the brake pedal.

 

I checked under the dash for a loose connection, but didn't see anything.

 

 

So, do I replace the 4-way flasher, check the left front side marker for a bad ground or what.

 

HELP!!!!

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There is no loose connection, quite the opposite.  One of the turn signal power leads and one of the parking lights power leads are shorting into each other causing the feedback you describe.

Thanks Ken. dwright2008-04-10 18:58:39

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Definitely sounds like a short somewhere between two power wires....
You say the dash lights come on when you hit the brakes...do you mean the cluster illumination lamps, or the red "Brake" light, or the two green turn sig indicators?

Here's an afterthought, goin on something Ken mentioned...
Check your bulbs, and the sockets carefully...you may have one of the bulbs in 1/2 turn off, even tho there are "pins" at different spots on the bulb housings, so they will only fit one way...theoretically.
I've seen some bulbs that would go in either way due to the bulb socket being messed up, or worn, or even one of the pins on the bulb is damaged. If you do this, then the bulb itself will create a "short" in the circuit, basically back-feeding the circuit...it's a long shot, but it can, and has happened. Adams' Apple2008-04-10 19:32:26

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Joel Adams
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It is the cluster illumination lamps, not the brake light or turn signal lights.

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Start with pulling out that left front marker light. I bet everything (except that light) will work normalfrom there.

Some where between the dash switch and that light wires are touching creating a backfeed.

Have you replaced or changed anything in the marker or dash area recently? This might be a point of interest. Although I still think it is the marker because it gets the most element abuse.

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The cluster illumination lights coming on would indicate a short between the park lamps, and the brake lamps. The only way it could happen would be if the wiring was touching, the bulb(s) half a turn off, or the turn sig switch... If you pull the bulbs out, and the problem still remains, then I'd think there is a wiring issue...

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Joel Adams
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Best of luck in the witch hunt!!!

Dave

I did relube my speedo cable in January, so I had stuff around the steering column moved, but the problem started last October.

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One other remote possibility is the turn signal switch.  Pretty much all lights go through it.  The other things suggested above seem more likely.

Larry

OK, so I started removing the bulbs one at a time.

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Another observation that may or may not be related to the power cross over.

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That light is supposed to shine down on the ground,so's when you crawl under the car to get the spare tire down have a little light to see what your doin

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C3VR Lifetime Member #93

Yep..spare tire lamp. What'll they think of next, eh?
Not sure when it should be on...perhaps with the door open?
There is one on my '85, too...I've never even looked to see when it comes on. Now I have to know...

The front turn sig flashes with the rear bulb out???? That's not normal. Usually, if there is a bulb burned out, the light will light up, but it won't flash. The flasher needs a certain amount of heat build up in it to open the circuit, and make the lamps flash. If on of the bulbs is out, the circuit doesn't have as much of an amperage draw, and the flasher won't get hot enough to flash.

Have you tried a NEW bulb in the left rear yet?

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Joel Adams
C3VR Lifetime Member #56    
My Link


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"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

I put all new bulbs in. No change.

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I guess I better keep my eyes open following you. Maybe someone else has cruise control.

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Lifetime Member #116
Dave's '82

   

Sometimes the simpliest solutions are right in front of you.

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[QUOTE=Adams' Apple]I've seen some bulbs that would go in either way due to the bulb socket being messed up, or worn, or even one of the pins on the bulb is damaged. If you do this, then the bulb itself will create a "short" in the circuit, basically back-feeding the circuit...it's a long shot, but it can, and has happened.[/QUOTE]


Thus the backfeed back to the dash lights...
I wonder how you got the bulbs in the socket? The little pins on the sides of the bulbs should keep that from happening, as they are staggered on twin element bulbs, but straight across on singles.

Oh well...glad you got some lights now!
Adams' Apple2008-05-21 10:24:34

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Joel Adams
C3VR Lifetime Member #56    
My Link


(click for Texas-sized view!)             NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

Glad you're lamps are in working order now, before the next trip.

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Lifetime Member #116
Dave's '82

   

Dave just muscled 'em in anyway!  If you push hard enough, anything will go.

Thats quite a trick Dave. Redwingvette2008-05-21 17:26:59

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Brian - NCM Lifetime Member

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Leather seats, Seatbelt Plus 3point seatbelts, Pioneer CD player
Magnaflow Exhuast System

Tim is right. It wasn't easy, but I got them in.

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