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How you can Diagnose a problem With Windshield Wipers inside a Automobile 1Place the automobile in "Neutral" to get a normal transmission or "Park" for an automatic. Set the emergency brake and raise the hood. Locate your principal fuse box and look for the windshield wiper fuse and-or relay. The fuse is going to be a type of glass tube or possibly a spade design. Visually inspect the fuse to find out if the filament inside either form is internally disconnected or blackened. Replace the blown fuse. Pull the relay out and swap it with yet another relay with the identical pin style and voltage. Auto tools

Turn the windshield wiper on and see if it functions. If it does, the fuse or relay was the problem.2Turn the windshield wiper on; you might also need to turn the ignition key for the "On" position. Appear and listen for windshield motor movement and sound. If you see no movement and hear no sound, turn the windshield motor switch off. When the wiper motor is concealed under the top rated outdoors vent panel, use a screwdriver to get rid of the panel. In case your windshield washer motor operates by a vacuum method, examine the vacuum hose for cracks and loose connections from its source towards the windshield motor. Repair the vacuum hose or tighten the connection.3Examine the wiper rod linkages.

You are going to see a principal driving arm and two wiper rod arms, supported by pivots. The linkage rods are connected by spacers and cotter pins, or with compact nuts. Make certain the pins or nuts have not come loose or fallen off the arms. The arms should not be bent or disfigured. Try to find twigs or compact stones wedged among the linkage arms and remove them. Move the linkage arms manually to see if they cycle. Spray some white grease on all of the linkage arm connections and pivot points.4Inspect the windshield wiper motor drive gear exactly where it connects using the main linkage rod. The gear or sleeve should not be broken or misaligned. Feel the mesh from the mating gears for tautness. Tighten the wiper motor mount bolts using a socket and ratchet, or use a screwdriver Obd2 scanner, if it is equipped with screw fasteners.

In the event the windshield wiper motor features a ground strap, unscrew the ground strap using a screwdriver and clean the connection with a piece of sandpaper, then reconnect it and tighten it.5Inspect the connector wire to the windshield wiper motor for a clean and tight fit. Turn on the ignition crucial along with the windshield wiper switch. Clamp a lead from a test light to ground and stab the hot wire on the wiper motor with all the test light probe. In case you have voltage, the problem lies with a defective wiper motor. Check your windshield washer pump motor in the similar fashion by possessing an assistant activate the pump button using the essential and switch on. Ground the test light lead and stab the test light probe in to the hot washer pump wire -- voltage at the washer pump motor means the little motor just isn't functioning.6Inspect the condition of the wipers blades if they fail to make a clean pass over the windshield and leave streaks. Replace them, if important, by unclasping the old blades and snapping the new ones on within the frame guides.