2006 cadillac CTS 2.8 v6. Two side brake lights went out

You have a dead short to ground somewhere on the feed circuit to the brake lights . Your best bet ,take it to a automotive electric shop. Or search finding electrical short on youtube ,an try your hand at fixing it yourself.

THE SHIFTER INTERLOCK RECEIVES ITS SIGNAL FROM THE BRAKELITE SWITCH.. NO BRAKE LIGHTS NO SHIFTY. CHECK THE STOPLITE SWITCH ON THE BRAKE PEDAL ARM

If all the brake light went out at the same time, then i would look at the brake switch. this is located along the brake pedal somewhere. remove it and play with it and see if will get them going again. if you do get the lights to start working, replace the switch. good luck.

go to the brake pedal siwtch and check voltage there, the center light is not on the same circuit

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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it is on the left side cylinder head...about mid way...between number 2 and number 4 Ignition coils...but lower...below but not under valve cover.

hi you have a bad earth to the rear lights, you need to find out where the ground point is and go from there. regards

The brake light switch itself is located on the brake pedal follow it down until you see where it connects and unplug the connection ...after installation make sure the brake light switch is correctly adjusted by having a 2nd person stand behind the vehicle as you press the pedal the light should come on if not adjust the switch higher up by turning the switch inward ..or upwards by screwing it in if it constantly on unscrew it until lights go out and its fairly easy once you actually look at the part and the pedal ...i hope that helps you

Check the fuse for the tail lights, if fuse ok, check the brake light switch under dash near top of brake pedal, might be bad.

Check the fuse and see if it isn't blown, if it is good, check the brake switch, it's near the top of the brake pedal on the back side.