Success! After checking the diagnosic codes, erasing and reading the codes again, the problem was isolated to the left front top lock circuit. I used Alldatadiy.com to locate where the wire connection points were and noticed the wire was tight where it went into the roof pillar. It turns out that a wire was pinched and grounded out. Everything started working when the wire was freed.

As for the stray wire, the only reference to a brown/red wire I could find was for the power antenna. Makes sense that it's hanging loose since the car has an aftermarket radio.

Thanks,
Tim