My cadillac has no break or hazard lights, the fuses keep blowing and cannot find the solution to this problem. When the car is in reverse, the lights will work however as soon as the break pedal is depressed, the 20 amp fuse blows immediately.
You have a short on the positive [hot] wire to the brake lights, done any drilling or trailer wiring? The brake light switch is doing it's job, [grounding the switch circuit], unless the brake light switch is wired hot and is grounding out. [this may be possible as I am not familiar with cadillacs.] If you had a short in the hot wire for the brake lights, they would stay on all the time. I would check the brake light switch.
Check both brake lights for moisture getting into them.
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