What could be the reason for the rear sunshade not lowering?
2 Answers
The reason the rear sunshade won't lower may be due to a malfunction in the rear window sunshade motor. Here's some knowledge about car generators: 1. Introduction: The car generator is the main power source of a vehicle, functioning to supply power to all electrical devices (except the starter) while simultaneously charging the battery when the engine is running normally. Based on the three-phase stator winding of a regular AC generator, it increases the number of winding turns and introduces wiring terminals, adding a set of three-phase bridge rectifiers. At low speeds, it outputs through the original and additional windings in series, while at higher speeds, it outputs only through the original three-phase windings. 2. Classification: Automotive generators can be divided into DC generators and AC generators. Due to the many advantages of AC generators over DC generators, DC generators have been phased out.
As a veteran driver with ten years of experience, I can tell you that rear sunshades failing to lower are often caused by mechanical issues. Track blockages are the most common culprit—dust or small toys stuck in the gaps can render it immobile. Motor failure is another reason, sometimes due to aging or lack of lubrication causing it to seize. Electrical components like faulty switch contacts or blown fuses also frequently occur. Short circuits or voltage instability are more common in older vehicles and can cause the entire system to fail. Last time I encountered this, I disassembled it myself for inspection and found dust buildup in the tracks. After vacuuming it out, it worked normally again. If the motor is broken, take it to a repair shop for replacement—don’t force it down to avoid damaging more parts. Preventive maintenance is key: manually test the up-and-down function monthly and spray some lubricant on the tracks to keep them smooth. In hot summers, a stuck sunshade affects rear comfort and visibility—using a sunshade as a temporary fix when parked is an option. Address the issue promptly to avoid distractions while driving.
