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Turn signal issue

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Old Aug 9, 2015 | 09:38 AM
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Question Turn signal issue

Just changed out some fuses, new starter too yesterday..
Now my left turn signal won't work while lights are up, but they work when the lights are down but it also causes my cluster to bunk with it.. Hazards work fine while lights are down also but not while the lights are up... Flasher problem or something else????
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Old Aug 10, 2015 | 02:28 AM
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Originally Posted by Karczewski
Just changed out some fuses, new starter too yesterday..
Now my left turn signal won't work while lights are up, but they work when the lights are down but it also causes my cluster to bunk with it.. Hazards work fine while lights are down also but not while the lights are up... Flasher problem or something else????
Its probably the bulb. Change the bulb first, see if that fixes it. If Im not mistaken the turn signals share the same light as the Daytime Running Lights on the Firebirds. I believe it illuminates differently when the headlights are on vs off .. I cant remember for sure though. Try the bulb first.
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Old Aug 10, 2015 | 09:59 AM
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Something like that can cause that much trouble??
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Old Aug 10, 2015 | 10:30 AM
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Moving to Stereo and Electronics.

It may not be the bulb; but it could be. For this problem, your issue isn't so much related to the headlights -> it's the parking lights, which come on with the headlights.

There are two filiaments in the front bulbs: one for the DRL/Turn Signals and one for the parking lights. For the front bulbs: your flasher actually "flashes" the DRL Module.

So, when your headlights are off, the DRL module has the DRL/Turn Signal filament "on" all the time and then turns it "off" with the flash from the turn signals. When the parking lights are on, the parking light filament is on and then the DRL module flashes the DRL/Turn Signal filament "on" with the flash from the turn signals.

If everything works fine during the day, (turn signals, DRL, hazards) then there must be some cross between the parking light and DRL/turn signal circuits. The could be caused by the wrong type of bulb, a bad socket, crossed wires, etc.

Is the problem happening on both sides of the car? When your parking lights are on, is one side of the car brighter than another?

Just for kicks - do you notice any change when you only have your parking lights on vs. your parking lights and headlights?
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Old Aug 10, 2015 | 10:40 AM
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They all seem to look the same to me.. I did change the signal light socket a while back but it had been working just fine until last Friday, changed both bulbs too. I did notice this morning my gauge cluster lights come on just by starting the car also...
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Old Aug 10, 2015 | 04:10 PM
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Do your cluster lights come on if you start the car with the parking brake engaged (i.e. DRLs not on)? If not, do they come on as soon as you release the parking brake (DRLs turn on)?

Your symptoms sound like the ground on your left TS/DRL lamp is gone and current is back-feeding from the turn signals/DRLs into your parking light circuit causing your cluster to illuminate. When you turn on the signals or hazards with the headlights, you have power on both sides of the socket so no current flows and the light doesn't work.

Use a test light or meter to check for a solid ground on the black wire at the left signal socket. That wire is normally connected to a ground bolt on the left side of the radiator support.
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Old Aug 10, 2015 | 04:26 PM
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Originally Posted by Karczewski
They all seem to look the same to me.. I did change the signal light socket a while back but it had been working just fine until last Friday, changed both bulbs too. I did notice this morning my gauge cluster lights come on just by starting the car also...
May also want to re-investigate the socket and make sure none of the splices came loose since you replaced it.
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Old Aug 10, 2015 | 05:51 PM
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Originally Posted by WhiteBird00
current is back-feeding from the turn signals/DRLs into your parking light circuit causing your cluster to illuminate.
Oh, is that what "bunk with it" means? lol
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Old Aug 10, 2015 | 08:09 PM
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Ok so I tried to re ground that turn signal, this was the outcome..



Headlight/brights won't work now and now the passanger side t/s is a lil dimmer than the driver side... <br/>So now I'm thinking I don't know what to think lol..<br/>And idk if this is suppose to happen but the front driver side marker blinks with turn signal while the other side doesn't..
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Old Aug 11, 2015 | 10:12 AM
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Originally Posted by Karczewski
And idk if this is suppose to happen but the front driver side marker blinks with turn signal while the other side doesn't..
Not supposed to happen. You still have a short somewhere. That marker blinking was probably happening before. I assume your gauge lights are still blinking?

What exactly did you do to re-ground the lamp socket?
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Old Aug 11, 2015 | 10:15 AM
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Yes, still blinking.
I just spliced a third wire to the black and grounded it elsewhere. Needless to say, it backfired
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Old Aug 11, 2015 | 10:27 AM
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As Whitebird pointed out, the issue is probably not with the ground. It's a cross between the power wires for your turn signals and your parking lights.

Whatever you did with the ground may have upset your headlights.
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Old Aug 11, 2015 | 10:39 AM
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Yeah, I would have to agree -_-
I'm going to get a ground tester after work and see what's up with all that. Any suggestions on the headlights and power wires?
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Old Aug 11, 2015 | 08:06 PM
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Ok, so thank you all for the help!! White bird, you're my hero lol. Problem solved, my splice wasn't good enough I suppose. But now the headlight won't work as mentioned before... And I tested the bulbs, they work.
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Old Aug 12, 2015 | 07:10 AM
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Did you end up fixing the original ground to the signal lamps or did you splice in another ground wire? The headlights share the same ground on the radiator support so if you didn't fix that factory ground, it could still be the source of your problem with the left headlight. Also, check that you didn't dislodge the 5-pin connector for the left headlight while you were working on the signals lamp.
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