What Causes the Windshield Wiper Slow Mode to Stop Working?
3 Answers
There are several reasons why the windshield wiper slow mode may stop working: 1. Blown fuse: When the car's wiper fuse blows, the wiper will definitely not function properly. In this case, a new fuse needs to be replaced. 2. Wiper switch damage: If the wiper switch malfunctions or has poor contact, it will affect the normal operation of the car's wiper. 3. Dead car battery: If the car battery is dead, not only will the wiper not work properly, but the car's lighting system, horn, and multimedia entertainment system will also fail to function. The windshield wiper is a device used to remove raindrops and dust attached to the car's windshield, improving the driver's visibility and enhancing driving safety.
I've encountered this issue before. There are usually several key reasons why the wiper's slow speed stops working. The most common one is a blown fuse, especially when the circuit is overloaded during heavy rain. Secondly, the wiper motor might be faulty—the gear set for the slow speed is prone to wear or jamming, particularly in older vehicles. Loose or corroded wiring connections are also a frequent culprit, as an unsecured plug can interrupt the current. Oxidized switch contacts or a faulty relay might also cause the slow speed to stop functioning. I recommend starting with the simplest fix: check the wiper-related fuse, usually the one in the fuse box, and try replacing it with a new one. If it still doesn’t work, you may need to disassemble the motor or switch to inspect the connections. Neglecting this issue long-term can lead to blurred vision during rain or snow, posing significant risks. It’s best to maintain the wiper system regularly to prevent breakdowns that could compromise safe driving.
Slow wiper failure can be analyzed from a systemic perspective, such as circuit design issues or component aging. The wiper motor internally switches between slow and fast speeds; damage to the slow-speed gear or burnt coils can render it immobile. A blown fuse will cut off the entire slow-speed circuit, and inspection and replacement usually resolve this. Corrosion or rust at wiring contact points leading to open circuits is quite common in humid regions; worn switch contacts should not be overlooked either, as over time signals may fail to transmit. A faulty relay can also disrupt slow-speed operation. It's recommended that owners check the fuse box themselves—replace any that match the labeled specifications. Additionally, be mindful of weather changes, as rain increases the wiper's load and accelerates wear. If this issue arises, avoid driving stubbornly; timely action can prevent costlier repairs, given that wipers are critical for visibility safety.
