Brake Light Switch not getting power?

5.3L • 4WD • AUTOMATIC
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COLE AP
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  • 2 POSTS
My brake lights quit working. Replaced the brake light switch, didn’t help. Checked the connector and wasn’t getting power.
Sep 15, 2026 at 10:49 PM
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STEVE W.
  • ✓Experienced Mechanic
  • 15,359 POSTS
If it isn't getting power there is a 20 amp Stop Lamp fuse in the under hood fuse box, Use a test light and see if it is blown. It powers both the CHMSL and the lower brake lamps. A quick test would be to turn on the hazard lamps, they are powered through a different fuse. If they work normally then it could be the fuse or the wiring under the box, which is a common failure item as they corrode easily.
Sep 15, 2026 at 11:55 PM
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COLE AP
  • MEMBER
  • 2 POSTS
All the fuses are good except Stop LP. And the hazard lights are working
Sep 16, 2026 at 4:57 PM
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STEVE W.
  • ✓Experienced Mechanic
  • 15,359 POSTS
OK you had power on one side of the fuse? If yes then replace the fuse and see if the lights now work. If you don't have power on at least one side of the fuse then there is a problem inside the fuse box.
Sep 16, 2026 at 6:05 PM
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