Information - Relay glow plug system

Glow plug relay: replacement and selection

When and why it is necessary to replace glow plug relay

Manufacturers do not set any interval for scheduled replacement of this component. The glow plug relay is mostly replaced in case of its contacts abrasion. Moreover, thermal damaging of the contact connections and their mounting seats is possible.

The cause for elements abrasion is intense use of the vehicle. And thermal damages are the result of failures in the car electric circuit.

Defectiveness of this unit can be indicated by difficult engine start and frequent activation of the glow plugs control lamp. In some cases this indicator, on the contrary, doesn’t activate. Also the sign of relay defect can be absence of specific clearly noticeable click, which normally should occur at key turning in the ignition switch.

In order to replace the relay, firstly, you need to disconnect all the wires which connect it to the electronic control module and the glow plugs. After this, you need to unscrew the device fastener and demount the relay itself. Thoroughly clean the component mounting seat. Then, you can install a new device. It is important to remember connectors plugging-in order before their removal, otherwise the relay and the glow plugs will operate incorrectly.

At necessity, you can install new glow plugs at the same time. This algorithm is generalized. Perform replacement of the relay in accordance with your car construction peculiarities.

How to select glow plugs relay

These devices differ by material the contacts are made of. The latter can be copper or copper-graphite. The advantage of the first type relay is more affordable price. At the same time the copper-graphite contacts are notable for longevity.

In order to make a new relay function as long as possible, purchase the component of a proven trademark. For instance, high-quality devices are produced under such brands as Febi Bilstein, SWAG, Hitachi.

If you want to make the right purchase, be guided by the main technical characteristics of your car, also considering engine design features. The relay, selected in accordance with the brand, model and production year of your car will suit it by all the parameters, including quantity of connection contacts. Moreover, it will correspond to the design of the glow plugs used in your car.

Glow plug relay at low cost: Top Spares

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