Yaris XP rear fog light issue

[CTScott]

The rear fog is fed by the 7.5A RR FOG fuse.

The rear fog switch either directly feeds the rear fog light or indirectly feeds it via the Rear Fog Light Relay. If your car has the relay it will be located on the bottom right side of the under-dash fuse panel.

The indicator is driven directly off the feed to the bulb, so if it is not on neither will the light be.

I would check for the presence of the relay on your car. If it is there, check to see if you hear it click when the headlights are on and you turn the rear fog on.