3rd brake light out no power .. check fuses all the fuse in both inside and outside boxes just because i was there anyways. Check light with direct power to it lights fine . Check for current to light im getting nothing with brake pressed or not pressed its light blue wire positive and black wire negative. check pigtail wire harness also nothing... Brake lights work perfect blinkers work fine reverse light all good plate lights good also. the 3rd brake light wire runs along the inside drivers side could the brake switch cause this ? also seen someone mention the parking brake switch? another said bcm . I have a pretty good understanding that BCM send a signal to light it up but does it go thru the brake switch or direct ? I know its on its own power source is why everything else works. just stumped on this one any help appreciated dont want to start buying all kinds of parts and still at square one. Thanks guys
Jun 28, 2026 at 5:56 AM
