How do you change a marker bulb in a Toyota Camry?

RTFM! Read the f*cking manual! The Toyota owner's manual has an illustration.

This is a very easy task.

(The driver side marker bulb is tricky because it's in a tight space beside the battery and fuse box cover. The bulb required is a GE 194 5W which costs about $2.)

Twist counterclockwise and remove the grey plastic bulb holder.

Replace the bulb.

Test new light operation with key in ignition switch and in the on position.

Replace the holder in the slot and twist into locked position.