Signal-Brake lite issue
There are harness connectors to the rear lights behind the left kick panel.
I'm sure that kick panel was removed for carpet install. Only 2 screws and one of those is plenty far enough from the wiring.
I'm thinking if the brake lamp current gets into the park lamp brown wires, the front fixtures would come on via park elements.
Lets remove a front 1157 bulb and determine which color wires the brake lamp current is traveling.
Silly question but asking anyway... you have speakers screwes to the kick panels or any extras at all there ?