Do it yourself
Frequently asked questions about cars and motorcycles

How to Test a Glow Plug?

Model: (Various brands) Various
Part: Glow plugs

As shown in this tutorial, testing the proper functioning of a glow plug is very simple. You will only need any model of tester. First, locate the glow plug to be tested, then disconnect the power cable to expose the pin that acts as a contact. Next, set the tester to the lowest resistance value available, connect the negative to any engine ground, and connect the positive to the glow plug pin. If a very low resistance value appears on the tester, such as 3 ohms in this case, the glow plug is functioning perfectly.

Updated on 14 May 2026 by ScegliAuto

Video tutorial

Related tutorials

(Various brands) Various In this video, the youtuber teaches us a way to test a glow plug, which is nothing more than a resistor; the terminal part becomes incandescent, in o…
(Various brands) Various The 1.3 CDTI engine is used in many models from Fiat, Lancia, Opel, and Suzuki, making glow plug wear a common issue. The glow plugs are located at t…
(Various brands) Various Let's debunk a myth: glow plugs on modern diesel engines are not really necessary for ignition, or at least not specifically just for that, but are m…

How to Bleed the Clutch on a Renault Clio?

To bleed the clutch on a Renault Clio, open the bonnet to access the components located in the engine bay: here, you will need to undo the screws that secure the battery in its housing, the intake manifold, and the coolant reservoir. This will allow you to locate the pipe through which the brake fluid flows: by inserting the other end of the pipe into a container, you can press the clutch pedal to expel all the fluid until it fills the container.

Watch the video!


by ScegliAuto

More videos