How can you tell whether the rear fog lamp is switched on?

The rear fog lamp is indicated by an amber (yellow) light on the dashboard. This warning light informs the driver that the rear fog lamp is switched on. Rear fog lamps are used in poor visibility conditions, such as fog, to make your vehicle more visible to others from behind. It is important to recognize the amber indicator because the rear fog lamp is brighter than regular tail lights and should be used only when necessary to avoid dazzling other drivers. Blue indicator lights typically show high beams, and red indicators usually signal other warnings, not rear fog lamps.