What causes the turn signal to intermittently fail and then work normally?

[LeRuth]

Possible causes include loose wiring or a faulty flasher relay. Here are the relevant details: 1. Turn Signal: The turn signal is an important indicator light that activates when a motor vehicle is turning to alert surrounding vehicles and pedestrians. The turn signal bulb uses a xenon tube, controlled by a microcontroller circuit, with alternating left-right flashing operation. The turn signal employs a flasher to achieve the blinking effect, which can be mainly categorized into three types: thermal (bimetallic strip), capacitor, and electronic. 2. Flasher Relay: Also known as a flasher, its function is to generate intermittent current to supply the turn signal lights, making them flash on and off to indicate the vehicle's direction. The flasher features a new circuit design consisting of a low-voltage switch circuit, high-voltage switch circuit, pulse generation circuit, two-stage amplifier with dual-transistor output circuit, and two sets of light indicator circuits.