Each fuse has a pair of tiny holes on top where you stick the probe of a test light or voltmeter. Turn the wiper switch to "low" or "high", and turn on the ignition switch, then test both test points in all the fuses. You can ignore any where there is no voltage on both points, and any with voltage on both points are good. You are looking for a fuse with voltage on one point and not the other. It is much faster and easier to just pull each fuse out and look at it to see if it has blown.
If you do find one that is blown for the wiper motor, suspect the motor is shorted. You can prove that by unplugging it, then replacing the fuse. If the motor is shorted, the new fuse will not blow.
What is much more common than a blown fuse is a bad ground for the motor. With the ignition switch turned on, and the wiper switch on "low" or "high", measure the voltage on the case of the wiper motor. If you find anything other than 0 volts, add an extra ground wire. You are also likely to see the motor start to run when you push on it.
Sunday, March 10th, 2013 AT 12:16 AM