Results 1 to 11 of 11

3rd Brake Light Out, No Voltage to it...

This is a discussion on 3rd Brake Light Out, No Voltage to it... within the General Help forums, part of the LSx Technical Help Section category; The 3rd brake light (LED) is not getting any power. Does anyone know the path the power to the 3rd ...

  1. #1
    Experienced Old Fart jfl330's Avatar
    Join Date
    Mar 2011
    Location
    Tampa, FL
    Posts
    154

    Red
    '02 35th SS LE SLP#1084

    3rd Brake Light Out, No Voltage to it...

    The 3rd brake light (LED) is not getting any power. Does anyone know the path the power to the 3rd brake light takes?

    I need to backtrack to find where the good power stops.

    Thanks!

    Jon

  2. #2
    Smiles for 9.5 Years cammed goat's Avatar
    Join Date
    Jan 2009
    Location
    Paterson/Ridgewood, NJ
    Posts
    11,474

    Phantom Black Metallic
    2004 GTO M6

    Usually, LEDs just burn out either at an LED diode or the curcuit board the LEDs are soldered to. When mine went, I used a Power Probe to "jump" the third brake light and it flickered, which deemed the LED bad. I ordered a replacement off eBay. I can't remember if the third brake light runs off the wiring to the tail lights/brake lights.

    Do your main brake lights work?

  3. #3
    Electrical Engineer KMdef9's Avatar
    Join Date
    Jul 2009
    Location
    North of the Motorcity
    Posts
    2,611

    Custom Swirly Black
    2001 WS6 M6

    Also, when you say it's not getting any power, do you mean you have tested for voltage at the light? How did you test it?

  4. #4
    Experienced Old Fart jfl330's Avatar
    Join Date
    Mar 2011
    Location
    Tampa, FL
    Posts
    154

    Red
    '02 35th SS LE SLP#1084

    Quote Originally Posted by cammed goat View Post
    Usually, LEDs just burn out either at an LED diode or the curcuit board the LEDs are soldered to. When mine went, I used a Power Probe to "jump" the third brake light and it flickered, which deemed the LED bad. I ordered a replacement off eBay. I can't remember if the third brake light runs off the wiring to the tail lights/brake lights.

    Do your main brake lights work?
    Yes, main brake lights are good.

    Jon

  5. #5
    Experienced Old Fart jfl330's Avatar
    Join Date
    Mar 2011
    Location
    Tampa, FL
    Posts
    154

    Red
    '02 35th SS LE SLP#1084

    Quote Originally Posted by KMdef9 View Post
    Also, when you say it's not getting any power, do you mean you have tested for voltage at the light? How did you test it?
    Cut the leads to the LED module, measured with DMM. Zip!

    Jon

  6. #6
    Electrical Engineer KMdef9's Avatar
    Join Date
    Jul 2009
    Location
    North of the Motorcity
    Posts
    2,611

    Custom Swirly Black
    2001 WS6 M6

    Quote Originally Posted by jfl330 View Post
    Cut the leads to the LED module, measured with DMM. Zip!

    Jon
    Tested them against each other? Or reference?

  7. #7
    Experienced Old Fart jfl330's Avatar
    Join Date
    Mar 2011
    Location
    Tampa, FL
    Posts
    154

    Red
    '02 35th SS LE SLP#1084

    Quote Originally Posted by KMdef9 View Post
    Tested them against each other? Or reference?
    Across the pair, expecting 12 Vdc.

    Jon

  8. #8
    Electrical Engineer KMdef9's Avatar
    Join Date
    Jul 2009
    Location
    North of the Motorcity
    Posts
    2,611

    Custom Swirly Black
    2001 WS6 M6

    Quote Originally Posted by jfl330 View Post
    Across the pair, expecting 12 Vdc.

    Jon
    Try grounding the neg lead, see if you get 12v on either of them that way. Then it will at least isolate which wire has the problem.

  9. #9
    Experienced Old Fart jfl330's Avatar
    Join Date
    Mar 2011
    Location
    Tampa, FL
    Posts
    154

    Red
    '02 35th SS LE SLP#1084

    Quote Originally Posted by KMdef9 View Post
    Try grounding the neg lead, see if you get 12v on either of them that way. Then it will at least isolate which wire has the problem.
    Will do, thanks. I suspect it is not connected somewhere as I know the LR QP was replaced and wonder if the conection runs through there.

    Jon

  10. #10
    Experienced Old Fart jfl330's Avatar
    Join Date
    Mar 2011
    Location
    Tampa, FL
    Posts
    154

    Red
    '02 35th SS LE SLP#1084

    Quote Originally Posted by KMdef9 View Post
    Try grounding the neg lead, see if you get 12v on either of them that way. Then it will at least isolate which wire has the problem.
    The 2 pin connector in the hatch in the back rear corner was not conencted.
    Took the whole back of the car apart tracing the circuit until I found that.

    Someone must have pulled the LED bar out and it yanked the connectors apart, lenghtened the wires put it back together and good to go!

    Jon

  11. #11
    Smiles for 9.5 Years cammed goat's Avatar
    Join Date
    Jan 2009
    Location
    Paterson/Ridgewood, NJ
    Posts
    11,474

    Phantom Black Metallic
    2004 GTO M6

    Good. Enjoy your car.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Parking Brake "Brake" light not turning on
    By Questioner in forum Firebird / WS6
    Replies: 1
    Last Post: 11-05-2015, 07:52 AM
  2. Help: Third brake light
    By james3340 in forum Firebird / WS6
    Replies: 12
    Last Post: 05-15-2013, 04:29 PM
  3. 3rd brake light for SS
    By steves2000ss in forum General Help
    Replies: 3
    Last Post: 11-09-2009, 09:39 AM
  4. Help: E Brake light.
    By bballking_2007 in forum General Help
    Replies: 15
    Last Post: 02-08-2009, 04:46 PM
  5. E-brake light
    By freshadenamufcka in forum General Help
    Replies: 2
    Last Post: 05-01-2008, 03:15 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •