Hyundai Glow Relay Short Circuit: What You Need to Know

If you own a Hyundai diesel car, you might have encountered a problem with the glow relay.

This is a device that controls the current for the glow plugs, which are essential for starting the engine in cold conditions.

A glow relay short circuit can cause various issues, such as misfiring, poor performance, or even engine damage.

In this article, we will explain what causes a glow relay short circuit, how to diagnose it, and how to fix it.

An image of Hyundai Glow Relay Short Circuit
Hyundai Glow Relay Short Circuit.

What Causes a Glow Relay Short Circuit?

A glow relay short circuit can be caused by several factors, such as:

  • Faulty glow plugs: If the glow plugs are worn out, damaged, or corroded, they can draw too much current and overload the glow relay.
  • Faulty wiring: If the wiring between the glow plugs and the glow relay is damaged, frayed, or exposed, it can create a short circuit and damage the glow relay.
  • Faulty glow relay: If the glow relay itself is defective, it can malfunction and send too much or too little current to the glow plugs.

How to Diagnose a Glow Relay Short Circuit?

A diagnostic tool or a multimeter can diagnose a glow relay short circuit.

A diagnostic tool can scan the car’s computer and display any error codes related to the glow system.

The common error code for a glow relay short circuit is P1326.

A multimeter can measure the resistance and voltage of the glow plugs and the glow relay.

A normal resistance for a glow plug is between 0.5 and 2 ohms and a normal voltage for a glow relay is between 10 and 14 volts.

If the resistance or voltage is too high or too low, it indicates a problem with the glow system.

How to Fix a Glow Relay Short Circuit?

A glow relay short circuit can be fixed by replacing the faulty components, such as the glow plugs, the wiring, or the glow relay.

The replacement process can vary depending on the model and year of the car, but generally, it involves the following steps:

  • Disconnect the battery and remove the engine cover.
  • Locate the glow plugs and the glow relay. The glow plugs are usually located on the cylinder head, and the glow relay is usually located on the fuse box or the firewall.
  • Disconnect the electrical connectors from the glow plugs and the glow relay.
  • Remove the glow plugs and the glow relay using the appropriate tools, such as a socket wrench or a screwdriver.
  • Install the new glow plugs and the glow relay and reconnect the electrical connectors.
  • Reconnect the battery and replace the engine cover.
  • Start the engine and check if the problem is resolved.

Conclusion

A glow relay short circuit is a common problem for Hyundai diesel cars, especially in cold weather.

It can cause various issues, such as misfiring, poor performance, or even engine damage.

Glow relay short circuit can be caused by faulty glow plugs, faulty wiring, or faulty glow relay.

A glow relay short circuit can be diagnosed by using a diagnostic tool or a multimeter.

A glow relay short circuit can be fixed by replacing the faulty components, such as the glow plugs, the wiring, or the glow relay.

By following these steps, you can ensure that your Hyundai diesel car runs smoothly and efficiently.

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