Hi Scotty and community,
I'm working on a 2011 Subaru Legacy, and the right/left brake lights don't work on it, but the 3rd brake light does. It's the same bulb as the tail lights, and those work no problem. Does anyone have an idea of what can cause this? There is no specific tail light fuse, it's a combination light fuse.
Thanks!
Assuming LEDs are not involved, if it's using the same bulb for tail lights and brake lights it's a dual-filament bulb. It's certainly possible for just one of the filaments to burn out in the bulb, and it's also possible the brake light filament is burned out on both sides. Check the simple stuff before digging deep - make sure the bulbs are OK. You can also use a test light to see if power is getting back there when brakes are applied.
Check the sockets for corrosion and check the grounding connections at the sockets.
but he said the tail lights work doc
If it's a dual filament bulb, the contact for the running lights may be good, but the brake contact point could be corroded. Just a shot in the dark. Get it, "dark?" HA! Weird that the third brake light works and not the other two.