Resoman wrote:
Could a bad fuse allow the bulb to work fine for the running lights, but prevent the turn signal and brake light from working?
Yes, the running lights are on a different circuit than the brake lights. However, both brake lights are usually on the same circuit, so if one brake light works, that would rule out the fuse for the brake lights as the culprit. Additionally, since the turn signal also doesn't work, it would probably rule out fuses, as the turn signals are on a different fuse than the brake lights.
If it were me, I'd check to see if the bulb socket wiring is compromised. Might be a loose or broken wire right at the socket.