Brake light

[Kind]

Hey all.
I recently completed the restoration of my GN and I noticed that my brake lights do not come on. However, the 3rd brake light does work fine. I am not sure how to trouble-shoot it. I assume they run of the same fuse so if it was a fuse issue then the 3rd brake light wouldnt be working either and if it was the brake sensor by the brake pedal the same would apply.

Am I correct on my assumption or is there a logic that I am missing here?

Thanks

 

[TurboTGuy]

There is a ground wire that connects to the left rear wheel well and it's the ground for the rear lamps. Check that first.

 

[John Larkin]

The 3rd brake light is on its own circuit. But it all comes from the plunger switch above the brake pedal. It all comes to a connector in the left rear trunk well.

 

[Kind]

There is a ground wire that connects to the left rear wheel well and it's the ground for the rear lamps. Check that first.

 

[salvageV6]

Search feature works. If it isn't the ground it's the harmonica connector on the column.

https://www.turbobuick.com/threads/rear-brake-lights-not-working.467336/#post-3903527

 

[salvageV6]

Here's a pic. of the connector on the column and white wire and socks that may be the problem.

 

[Kind]

Here's a pic. of the connector on the column and white wire and socks that may be the problem. View attachment 386065

Thanks buddy this would really help

 

[Kind]

The 3rd brake light is on its own circuit. But it all comes from the plunger switch above the brake pedal. It all comes to a connector in the left rear trunk well.

Yeah got that