Do you mean stand beside the car and psychically determine what is wrong? You will have to hold your computer closer to the car. (We used to say "hold your phone closer to your tv so we can see what it's doing!)
Have you done any testing or diagnosis? If so, what were the results? If not, start with the basics. Check for blown fuses under the hood and inside the car. From there you will need a live person to determine what's working and what is not. For example, if there is a relay for the wiper motor, is it clicking on? If it is not, do not expect the motor to run. The problem is before that, and a good suspect is the switch and associated wiring. If the relay does click, you know the switch is working and you would work toward the motor. On a car this new there's going to be a body computer involved too. A common clue is if the computer is at fault, typically the wipers will still work in the slow or fast modes but not in delay mode.
You can also check for a bad ground on the motor. There is a metal strap riveted to the mounting plate to ground it because it's mounted on insulating rubber bushings to isolate vibration. Sometimes that strap arcs under the head of the bolt where you cannot see it. To test for that, use a test light grounded to the battery negative post or engine block, then touch the test probe to the metal case of the wiper motor or the metal plate it is mounted to, then turn the wiper and ignition switches on. The test light should not light up. If it does, attaching a separate ground wire is the easiest repair. I can tell you how to do that if it proves to be necessary.
Tuesday, December 20th, 2016 AT 4:25 PM