What Causes the Headlight Adjustment Motor to Keep Making Noise?
2 Answers
Headlight adjustment motor continuously making noise is caused by wiring issues, specifically poor grounding of the headlight wiring harness. This can be resolved by improving the grounding. Headlight adjustment motor control principle: It operates by converting the input signal from the height position sensor into a voltage signal through an algorithm. The headlight control module then drives the motor to adjust the headlight position. Here is some related information about headlights: Automotive headlights, also known as front headlights or LED daytime running lights, serve as the 'eyes' of a car and are closely related to safe driving at night or under adverse weather conditions. The use and maintenance of car lights should not be overlooked. Electrically adjustable headlights allow for fine-tuning of the headlight height via a knob inside the cabin, primarily to accommodate adjustments for fully loaded and partially loaded vehicle conditions.
I've dealt with similar issues many times before. The main causes of a continuously noisy headlight adjustment motor can be categorized into several types: Mechanical jamming is the most common, such as internal gear wear or dust blockage, causing friction noise when the motor rotates; Circuit faults are also a key factor, such as poor relay contact or short circuits, which can cause the motor to operate under overload continuously; Another possibility is motor aging or moisture exposure, especially after use in rainy environments, where metal parts rust and cause abnormal noises. If this problem is ignored, the motor may burn out, affecting the headlight height adjustment, causing the lights to fluctuate during night driving, severely compromising visibility safety. I recommend starting with simple solutions: Check if the manual adjustment button is stuck and clean any debris around the headlight; if that doesn't work, seek a professional to test the circuit with instruments to avoid making the problem worse. Regularly wiping the headlight area during car washes can prevent dust and moisture buildup, preventing further deterioration.
