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paperthin November 15th, 2019 14:18

third Brake light Failing
So on my 2015 A3 TDI the 3rd brake light does not come on. I took it off and bench tested it, it is fine. I am about to go out and double check that 12v is going to the connector but not sure if that is going to work. I will scan with VCDS shortly too. Is there fuse I can check? Any other ideas? Everything else is working properly.

paperthin November 17th, 2019 07:36

Scanned and got the following which is no surprise.

11274 - Bulb for Center Brake Light
B12C6 15 [009] - Open or Short to Plus

Other places on the internet suggest loose solder on the light. This is not the case as I benched tested it again, and works perfectly, all diodes on bright.

I cleared all faults and will drive on monday to see what comes back.

I am inclined to just let it go for now. Anyone have schematics?

paperthin November 25th, 2019 14:25

Well...i haven't figured out what is wrong. I tried to measure the voltage out of the cable connector but had difficulties. The fault comes on immediately. If I figure out anything else I will update. I was hoping it was a loose solder like many people on the internet suggest. The cheapest I can find the light right now is $150 CAD.

A3Dave November 30th, 2019 17:58

Connector is good? I had my turn signal connector melt a few days ago.

paperthin December 4th, 2019 07:22


Originally Posted by A3Dave (Post 5554581)
Connector is good? I had my turn signal connector melt a few days ago.

I will take a closer look when I get a chance and report back, I don't think I looked at it close enough.

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