Any car w/ red turn/brake lights often have same problem in my Cave, Sneak Path
Pull all rear sockets out. Look at bulbs when On, in this case w/ park/tail lights On. Only 1 filament should be On.
Pedal or turn switches may have problems too keeping brake lights off.
If not controlled by BCM... likes has same taillight wiring setup as Fiero notchies.
Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
The Ogre's Fiero Cave