Hello.
We would suggest that you look at the wiring connector under the bed, that feeds the taillamps.
You will probably find a coroded wire in the connector. If the 3rd brake lamp works, all of the fuses and switches are good.
Testimonial: "All connectors were fine. It ended up being that both brake light blubs blew at the same time. Thanks"
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2003 tundra 15 amp acc fuse
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