07' mitsu. endeavor. what is the warning light on the lowest right hand corner of the dash. it looks like an upsidedown half circle with a jagged line as the bottom of it and an exclamation point inside of the half circle with a small line on each side of the top of the half circle.

Is this one of the 3 lights in the lowest corner of the display? These 3 lights are for the 3 following functions.
-(Top lamp). Speed limiter Light.
-(Bottom left lamp). Trans Axle warning light.
-(Bottom right lamp). Oil Pressure Warning light.
This sounds like it could be the speed limiter. Check for any switches on the dashboard and the steering column for switches with the same logo as the speed limiter light as this can flash to show it is active.
The Trans Axle warning is the systems electronics showing there is a possible issue with the transmission.
The Oil Pressure light shows there is an issue with the oil system such as low oil or low oil pressure in the engine.
You will often find the Trans axle and Oil warning lights usually don't flash.
Try this website for an owners manual for your vehicle.

https://www.manualslib.com/manual/53030/Ford-2005-Freestar.html?page=10#manual

Does it look like a tire? it could be your tire low pressure sensor, fill your tires to proper pressure and see if it goes out.

Low tire pressure

Not sure from your description but this sounds like your traction warning light (left side of the warning light panel, it looks like a triangle with an arrow going round it in a circle), it normally comes on when you have either turned the traction control off via the button on the dash or if its wet on the road. It can also be caused by cornering too fast.

It should be in the owners manual, Brake warning??? Red?? AMBER????Ck here??? http://www.carlingtech.com/pdf/vl_serswitlegends.pdf

It's a warning that one of your exterior lights are not working. Could be any of them...headlight, taillight, brake light. Turn your headlights and emergency flashers on and take a walk around the car.

check your brake fluid level( as this light is the hand brake warning light) but if it comes on with the hand brake in off position and ignition on it warning low fluid level in the braking system

this sounds like the Traction/Stability control and ABS warning lights, they are art of the same system and come on together.

That should be your handbrake light