No Rear Brake Lights

2005 Equinox, last week my left rear brake light stopped working. I replaced the bulb and checked the fuse, did not correct this issue. Now yesterday my entire rear brake lights are out. Has this something to do with a brake pedal switch perhaps? If so, how do I check and replace? Thanks in advance!

2005 Equinox, last week my left rear brake light stopped working. I replaced the bulb and checked the fuse, did not correct this issue. Now yesterday my entire rear brake lights are out. Has this something to do with a brake pedal switch perhaps? If so, how do I check and replace? Thanks in advance!


The light blue wire coming out of the brake light switch should have 12v when the pedal is applied. Same color wire back to the brake lights.

Red and white wire is power into the switch from the fuse box.