As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT ROUTED FROM TPA TO ABQ DIVERTED TO DAL WITH THE LEFT GEAR RED LIGHT ILLUM IN FLIGHT, BUT WENT OUT WHEN THE GEAR WAS LOWERED FOR LANDING. MADE AN UNEVENFUL LANDING. REMOVED AND REPLACED THE GEAR POSITION SENSOR AND C/W RETRACT CHECK WITH NO DISCREPANCY NOTED PER BOEING MM.