Types and detection methods of relays commonly used in automobiles-Zhejiang Hui You Auto Parts Co., Ltd.

Types and detection methods of relays commonly used in automobiles

Posted by Admin | 08 Nov

Automotive Relays: Commonly Used Types and Testing Methods

Automotive Relays Professional Knowledge - Dry Goods

First, the commonly used automotive relay is the 4-pin normally open relay. Less commonly used relays include three-legged relays (such as flashers), five-legged relays (with both normally open and normally closed contacts), multi-legged relays (such as wiper clearance relays), and so on.

Second, unknown to many, the main form of relay damage is contact ablation rather than coil burn. Some people think that as long as the relay can pull in, there is no problem. This idea is very wrong. The reason is simple: the contact handles a large current, and over time, it is naturally easier to burn out, while the coil handles a small current, so it is basically less prone to damage.

Thirdly, if an automobile relay does not work, one often-overlooked reason is that the relay pins are oxidized or have poor contact with the socket, rather than the relay itself being damaged or the wiring being faulty.