1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

85 gsl-se No running lights

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Old Mar 26, 2010 | 10:15 PM
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85 gsl-se No running lights

Checked all of the the fuses and the rear tail lights have all new lights. Instrument cluster,front park lights and rear tail lights still will not work. Has anyone else had this problem? Oh and I've searched the forum archive and google...just a FYI
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Old Mar 26, 2010 | 10:28 PM
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Could a bad combination switch make this happen?
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Old Mar 27, 2010 | 10:24 AM
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Any time I have run into this, it was a fuse....... maybe take a double check??
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Old Mar 27, 2010 | 11:19 AM
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I am having the same problem and i cant figure out whats wrong!

it started when i unplugged my head light and put it back in. Now my running lights, dash lights, fog lights, and third break light does not work. My head lights work and they will pop up but they will not go down.

I checked all my fuses three times and had someone else look at them and i also checked my fusible links with a voltmeter.

Im clueless
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Old Mar 27, 2010 | 06:25 PM
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Originally Posted by lx_machado
I am having the same problem and i cant figure out whats wrong!

it started when i unplugged my head light and put it back in. Now my running lights, dash lights, fog lights, and third break light does not work. My head lights work and they will pop up but they will not go down.

I checked all my fuses three times and had someone else look at them and i also checked my fusible links with a voltmeter.

Im clueless
Now check this out. I put a new fuse in and as soon as I turned the park lights on it popped instantly. Would a bad fuseable link cause that?
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Old Nov 4, 2020 | 03:38 PM
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acdelco d1906 Nkg 49034
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which lights are my running lights when I look at the LEFT tail light assembly from the inside of the car?

My running lights are out.

Pictures with arrows would be nice.

Brake lights, reverse lights, turn signal lights, head lights are all good.

I'm going to remove the white thingy inback of the combi switch and hit it with contact cleaner.

Last edited by midnight mechanic; Nov 4, 2020 at 05:03 PM.
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Old Nov 12, 2020 | 03:26 PM
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I had the same issue, ended up being a little bit of corrosion in the fuse socket. I was checking the fuses without pulling them, so once I finally pulled on the fuse my lights came back on. Cleaned it with a thin nail file and no more problems.
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Old Nov 12, 2020 | 05:59 PM
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acdelco d1906 Nkg 49034
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Before, on a different car, cleaning the fuses solved the problem. In this car, it's only the running lights, and the license plate light are out. Everything else works including the horn. The 6 connector head light wire colors don't match what is in Clymer's and Hayne's manuals.

The car has been rebuilt after a firey wreck before I bought it. VIN says it's a '83, but 2 rims say 82, and the differential and drive shaft is from an 82.

Near as I can tell, the combi switch is NOT connecting like it should when the turn signal stalk is rotated, and if I jump connections (eliminate the combi switch), that doesn't work either. I don't see any obvious shorts.

Green Blue dash orange is always hot. The 3 thick red wires turn on the headlights if the turn signal stalk is rotated, or if jumped from the hot Green Blue dash orange wire. And it doesn't matter what position the ignition key is in. Jumping from the hot Green Blue dash orange wire to Red Blue or to the Red Green beeps the horn.

I'm about to run a wire from the battery (fuse protected) to a toggle switch and then to each running light.

Last edited by midnight mechanic; Nov 13, 2020 at 01:58 AM.
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Old Nov 15, 2020 | 04:38 PM
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From: huntsville
headlight 6 connector


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Old Nov 15, 2020 | 09:12 PM
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From: KC
Check the ground first.
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Old Nov 16, 2020 | 03:33 AM
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thankyou Kansas, it is working now. According to schematics from the internet, AutoZone, Clymer's, and Hayne's manuals, every light has its own local ground. I labeled that picture for my own future reference of how it is supposed to be when things are working. And that hot, unless the headlights are on wire's color on my car, doesn't match the schematics.

Also, the wire harnesses are labeled in english, the differential had an english inventory number on it. Some metal body parts are heavily rusted, and there are some melted plastic and rubber hidden unless you take apart things. Tomorrow I'll post a pic of the driveshaft tunnel. The rear panel had some welding done on it, as well the wire harness has red spray on it.

Last edited by midnight mechanic; Nov 16, 2020 at 03:36 AM.
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Old Nov 17, 2020 | 06:51 AM
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Do the high beams work? When my switch went, the low beams didn't work but the highs did. If it were a bad ground, you would see power at the bulb when you turned the switch.
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Old Nov 17, 2020 | 02:42 PM
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acdelco d1906 Nkg 49034
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ess wooking now

yes, most the time the combi switch is bad when the hi's work but not the low's or vice versa

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Old Nov 18, 2020 | 12:05 AM
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when i had the problem of highs working but not lows, it was just a matter of cleaning the contacts inside the switch.
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Old Nov 18, 2020 | 04:06 PM
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Originally Posted by midnight mechanic
thankyou Kansas, it is working now. According to schematics from the internet, AutoZone, Clymer's, and Hayne's manuals, every light has its own local ground. I labeled that picture for my own future reference of how it is supposed to be when things are working. And that hot, unless the headlights are on wire's color on my car, doesn't match the schematics.

Also, the wire harnesses are labeled in english, the differential had an english inventory number on it. Some metal body parts are heavily rusted, and there are some melted plastic and rubber hidden unless you take apart things. Tomorrow I'll post a pic of the driveshaft tunnel. The rear panel had some welding done on it, as well the wire harness has red spray on it.

It's been like that since I bought it in 1990
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