My brake lights went out on my 2006 cadillac cts. i checked the bulbs and the are fine. I located the fuse box under the back seat but have no clue which one to change.

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Covered by two relays

Cadillac CTS (2008-2014) fuses and relays

https://fuse-box.info > cadillac > cadillac-cts-2008-2009...

Here you will find fuse box diagrams of Cadillac CTS 2008, 2009, 2010, 2011, 2012, 2013 and 2014, get information about the location of the fuse panels inside ...
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Cadillac CTS (2008) - fuse box diagram - Auto Genius

https://www.autogenius.info > cadillac-cts-2008-fuse-bo...

Sep 25, 2016 - The rear compartment fuse block is located on top of the battery, on the right side of the trunk. The battery access door must be removed to ...

2008 Cadillac CTS fuse box diagram - StartMyCar

https://www.startmycar.com > CTS > Fuse box

The 2008 Cadillac CTS has 2 different fuse boxes: Underhood Fuse Block diagram. Rear Compartment Fuse Block diagram. * Cadillac CTS fuse box diagrams change ...

Please check the fuse blocks under the rear seat.

There are 2. One under the hood and one under the Drivers Left Knee under the Dash

On this website you find fuse box diagram and description for Cadillac CTS


https://www.carknowledge.info/category/cadillac/cts

The driver's side rear fuse block is located under the rear seat on the driver's side of the vehicle. The rear seat cushion must be removed to access the rear fuse block. See "Removing the Rear Seat Cushion" listed previously.

To access the fuse block, push in the two tabs located at each end of the fuse block cover. Then lift the cover off...







From owners manual.

The fuse block that contains the brake light relay is under the left side of the rear seat.There is also
a fuse block under the right side of the rear seat. Another behind the dash under the steering column. And one more under the hood right front corner of the engine compartment. If the relay is
good, check the brake light switch for constant 12v in and 12v out when peddle is pushed.
The brake light switch is under the dash at the top of the brake peddle. Hope this helps.

I assume the solution is the same in a CTS as a CTS-V. Remove the plastic molding facing the rear. There are four plastic screws, Unscrew and lift the spare tire cover. Unscrew plastic screws on carpet covering quarter panels pull back for room to work. Each light assembly has two nuts, remove these and assembly will slide out for easy replacement. Since both lights stopped at once, the fuse may be the issue. The fuse box is under the rear seat cushion, behind the driver. Pull the seat up and forward. Pull levers out on each side of fuse box cover and lift. The diagram is inside the fuse box cover. It'll take a 15V. Note: Please take care in replacing and seat and proper seat belt placement. While you're in the backseat, check all the fuses, there's a second fusebox on the passenger side. Also, check floor behind driver's seat for wetness and water. That could cause a short as well. Good luck!

Hello Yvonne:

1st thing to check is your Fuses, Could be that its only a Blown Brake Light Fuse.

If your Brake Light Fuse is good ,Then i would Try to put New Bulbs in and see if its That for some reason both bulbs just happen to burn out at same time.

And if still no Brake Lights you'll need to Replace your Brake light switch,which is located drivers side under dash mounted to the Brake pedal Metal part up above where you push the brake pedal.

You'll see the wiring that connects to the Swith,Just pull off the wire connector and remove the brake light switch.

Yvonne this will get your brake lights working.

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im replacing the BPP sensor on one now, Brake Pedal Position sensor

Take it to any local repair shop.

The ABS Relay,is for the system pump motor,nothing to do with lighting circuits.

Check brake switch !