The Stovebolt Site Forums The Shop Area The Electrical Bay Parking lights vs. turn signals '48 3100?

The 1949 Chev truck wiring diagrams shows stop (white) and tail (black) and both 16 gauge wire.

http://chevy.oldcarmanualproject.com/electrical/wiring/index.htm

The bulb goes in one way.

Maybe someone know which filament is the larger/brighter?

On the rear, those two filaments served as parking/marker/driving and brake light. I forget which one was used for turn signal.