Cadillac Repair: 1999 CADILLAC ESCALADE, windshield wipers, cadillac escalade

Question
MY POWER WINDOWS AND WINDSHIELD WIPERS WORK WHEN THEY FEEL LIKE IT.  I TOOK THE TRUCK TO MY MECHANIC AND THE WINDSHIELD WIPERS AND WINDOWS WORKED FOR THE WHOLE THREE DAYS THEY HAD IT.  TWO DAYS AFTER I GOT THE TRUCK BACK THEY DIDN'T WORK AGAIN.  CAN YOU GIVE ME AN IDEA WHAT COULD BE WRONG, BECAUSE MY MECHANIC CAN'T FIX THE PROBLEM IF HE CAN'T FIND ANYTHING WRONG.

THANKS

Answer
Have you had ANY type of work of ANYKIND performed anywhere on the vehicle within the last 6 months ?.

This is usually caused by an intermittent GROUND connection. Check all the BLACK colored wires near the battery on within the engine compartment to make sure that they are clean and tight.