Having a front wiper issue is not uncommon. This is even one of the most common problems, and not just on the Toyota 4runner. Windshield wipers have become consumable because they wear out quickly and are easy to replace . But the problems can be quite different, and the reasons will therefore vary. It can come from broom , engine , or a electrical concern especially. So we will see the most common symptoms and how to fix them.
Complete failure of the front wiper of your Toyota 4runner
The problem is undoubtedly the engine of your front wiper. If you ever want to be sure, you can measure the electrical current at the input of the wiper motor. However, this is a precaution that is not really mandatory. The fault is probably due to the engine. In this case, you will have to buy a new engine, compatible with your Toyota 4runner . It is also possible that the concern comes from broom training . In this situation, make it activate manually. If it ever moves on its axis perfectly, it is because it presents no problem.
The front wiper of your Toyota 4runner is noisy
A noisy front wiper on a Toyota 4runner is not a serious concern, however it is quickly annoying. If you ever hear a shrill noise is that it must come from the wear of the rubber blade of the broom. As if you were operating it on the dry windshield. In this situation, it will probably have to be changed. If ever it's a squeaky noise , the training is probably slightly seized. You just need to lubricate it, and the problem will be solved.
Toyota 4runner's front wipers don't go at the right speed
This time it is a concern that can be problematic, especially during torrential rains and that the front wipers are abnormally slow. For comparison, at maximum speed, the speed is about one round trip per second. If they are indeed much slower, the causes could be multiple. But there is a strong probability that it is the engine which is in question. You can always dismantle components to discern what is holding back the process. Be careful not to damage the windshield. It is also possible that the state of wear of the broom slows the mechanism. In this situation, you just need to change the brushes .