My middle and right brake light won't work but the left does
The right light might just be a lamp or socket, but the third eye light is powered directly from the brake switch, so you know the switch works cause you have 1 brake light that works, so the third eye has blown it's bulbs or circuit board, or there is a break in the wiring from the brake switch to the light assembly, a simple test light on both the wires can tell you that.
K thank you I think the middle light might have been going in an out
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