The instrument panel lights and front parking lights are going on because one the tail lights has lost it's ground circuit. The brake light is finding ground by running through the tail light circuit, energizing it.
I had a similar problem, and fixed the ground. My problem was that a corroded connection on a brake light housing caused the ground to overheat, and melt the plastic lug the light housing was screwed to, along with the ground on a ring connector. Cleaned it all up and loaded it with dielectric grease on re-assembly fixed it for good.
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