[wiswind]

ABS light, check brake fluid level in master cylinder.
If not full to the top side of the full line, the ABS light can come on.

While you are doing that, look on the bottom of the master cylinder.
There is a switch there (wires going to it) that is prone to leak.
If it has moisture, replace it.

Otherwise, a common cause is an issue with the wheel sensors.
At each wheel, behind the brakes, is a gear.
This gear is the exciter ring, and there will be a sensor located about 1/4" away from the teeth of the gear.
The sensor creates an electrical pulse each time one of the teeth on the gear passes it.
This is how the ABS system keeps track of how fast each wheel is turning.
Sometimes, a sensor can get bumped, causing too big of a gap, and it then does not pick up the signal.
The sensors and gear can also become damaged.

Lights below the bumper would be fog lights.
They likely have a separate switch for turning on.