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Rear Brake/Turn Signal Light Problems


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#1 01silverado2500

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Posted 17 May 2005 - 04:27 PM

I know……another post by me and its not truck related…sorry....but its still GM…….

Well I was following my dad today, he was driving my LTZ, and I noticed that the right taillight-brake light would go out whenever the left turn signal was on. So I changed the bulb in the right side taillight and the same thing still happens. If I put on the right turn signal, it flashes properly and the left Brake light stays illuminated. When I apply the brakes, both tail lamps and the 3rd brake light illuminate. All other turn signal bulbs work and the hazard flashers work properly.

The rear tail lamp on the Lumina contains one bulb #3057 (double filament for parking lights/brake lights). All other lights on the car work properly.

Any ideas what could be wrong? What needs to be checked? If I need parts to fix it?

Thanks for your help GM Tech.
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2005 GMC Sierra SLE Z71, 5.3 HO 310hp, 3:42s -- My Truck
1999 Monte Carlo Z34, 3800, Torch Red-Black Leather -- My Toy

2010 Equinox LTZ AWD V6, Mocha/Brownstone-Black Leather -- Moms SUV
2006 Silverado 2500HD DURAMAX LBZ ALLISON 6 Speed, EC, LB, 4x4, 3:73s, LT2 -- Dad's Truck
2006 Vibe AWD -- Sister's car
1993 Corvette, 40th Anniversary, Ruby Red, LT-1, Very Low Miles
Cougar 25' 5th Wheel

#2 01silverado2500

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Posted 17 May 2005 - 10:58 PM

I had a friend tell me that maybe the turn signal switch in the steering column may be bad. I am a little worried if I have to remove the column because the car has air bags. Is there a way to trouble shoot the switch to see if it’s the problem?
Posted Image
2005 GMC Sierra SLE Z71, 5.3 HO 310hp, 3:42s -- My Truck
1999 Monte Carlo Z34, 3800, Torch Red-Black Leather -- My Toy

2010 Equinox LTZ AWD V6, Mocha/Brownstone-Black Leather -- Moms SUV
2006 Silverado 2500HD DURAMAX LBZ ALLISON 6 Speed, EC, LB, 4x4, 3:73s, LT2 -- Dad's Truck
2006 Vibe AWD -- Sister's car
1993 Corvette, 40th Anniversary, Ruby Red, LT-1, Very Low Miles
Cougar 25' 5th Wheel

#3 GM-Tech

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Posted 18 May 2005 - 06:25 AM

What model year is this Lumina?

#4 01silverado2500

01silverado2500

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Posted 18 May 2005 - 09:05 AM

1998 Lumina LTZ
Posted Image
2005 GMC Sierra SLE Z71, 5.3 HO 310hp, 3:42s -- My Truck
1999 Monte Carlo Z34, 3800, Torch Red-Black Leather -- My Toy

2010 Equinox LTZ AWD V6, Mocha/Brownstone-Black Leather -- Moms SUV
2006 Silverado 2500HD DURAMAX LBZ ALLISON 6 Speed, EC, LB, 4x4, 3:73s, LT2 -- Dad's Truck
2006 Vibe AWD -- Sister's car
1993 Corvette, 40th Anniversary, Ruby Red, LT-1, Very Low Miles
Cougar 25' 5th Wheel

#5 GM-Tech

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Posted 18 May 2005 - 05:18 PM

Looked at the schematic. Nothing jumps out at me. Grounds can cause weird light problems like that, as can a wrong bulb in a socket.

Sorry I can't be any more help than that.

#6 01silverado2500

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Posted 18 May 2005 - 05:36 PM

Well looking at the schematic that I got, it looks like there is a setup in the turn signal switch that keeps the opposite brake light illuminated when the signal is on. The schematic shows this as a green wire to the taillight. So Im gonna test that wire for power, if that has no power then it looks like it may be the tuen signal switch.

Thanks for looking it up, I just didnt know if this was a common problem or not. :seeya:

Edited by 01silverado2500, 18 May 2005 - 05:37 PM.

Posted Image
2005 GMC Sierra SLE Z71, 5.3 HO 310hp, 3:42s -- My Truck
1999 Monte Carlo Z34, 3800, Torch Red-Black Leather -- My Toy

2010 Equinox LTZ AWD V6, Mocha/Brownstone-Black Leather -- Moms SUV
2006 Silverado 2500HD DURAMAX LBZ ALLISON 6 Speed, EC, LB, 4x4, 3:73s, LT2 -- Dad's Truck
2006 Vibe AWD -- Sister's car
1993 Corvette, 40th Anniversary, Ruby Red, LT-1, Very Low Miles
Cougar 25' 5th Wheel




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