Common Indications of Issues with Toyota 4Runner Windshield Wiper Arm
Your SUV's windshield wiper system is a crucial support system because it provides the convenience of cleaning the windshield with just a push of a button. The windshield wiper arm is the part of the system that connects the wiper blade to the wiper motor. This means that it is the one that transfers the wiping motion necessary in effectively cleaning the windshield. Over time, you may experience problems with the wiper arm. Following are some symptoms telling you to check the part:
One wiper moves slower
If one wiper moves slower than the other, there may be a problem with the windshield wiper arm. Since the wiper arm is the one transferring the wiping motion from the motor, problems with movement should be associated with the part. In this case, the retaining nut at the bottom of the wiper arm may have gone loose.
One wiper does not move at all
This is another symptom that is associated with the windshield wiper arm's retaining nut. In this case, the retaining nut may have gone totally loose, dislocating the connection between the wiper motor and the arm. Another possibility is a rusted retaining nut caused by exposure to moisture and water.
Chattering occurs when the wiper blade does not glide smoothly through the windshield glass. Not only is this problem irritating to the eyes and ears, it also means that the wiper is not cleaning the windshield well. While this issue can be caused by a worn out rubber wiper, it can also be a result of a bent Toyota 4Runner windshield wiper arm. If the latter is the case, you can remove the wiper arm and try to have it straightened.
The Toyota 4Runner windshield wiper arm is positioned in such a way that it is always leaning against the windshield. This position is secured by springs that push the base of the arm. There may come a time when the wiper skips a portion of the windshield, producing thumping sounds and leaving dirty spots. This may be a result of a contaminated spring that affects the operation of the wiper arm.