Cadillac: anti-lock brake light and red brake light came on, brake light switch, cadillac sedan deville

Question
1990 Cadillac Sedan Deville. Both brake lights came on and stayed on for about 15 minutes while driving. Then, they went off and did not come on again. I checked both sides and did not find any problems. code f47. What is this code? and do I need a brake repair?  

Answer
F47 = Very low freon in the A/C system.

Check your brake light switch located up under the dash up high on the brake pedal arm. It is a plastic switch with a plastic button that touches the arm of the brake pedal. Buy a new one so you will see what your looking for.