How to Test Glow Plugs – The Supply Voltage & Timer Operation (Video)

How to Measure the Glow Plug Resistance When Removed from the Vehicle.

How do You Test a Glow Plug Timer & the Supply Voltage?

It’s easy to check if you have a test meter (multimeter).

  • Remove one of the glow plug connections and connect your test meter.
  • Switch on the ignition (but don’t start your engine).
  • Check how long the timer (control module, or relay) voltage is supplied to each of the glow plugs. It should be for around 10 to 20 seconds dependant on the vehicle.
  • Whilst checking the timer, you can also check the supply voltage is correct.

Note:

You will have to switch the ignition off and on, each time you check a glow plug – To reset the supply voltage timer.


Ordering Parts (Glow Plugs, Test Meter, Tools, etc):

The following table gives examples of the test equipment, tools, etc you can buy to fix your vehicle. If you’re not sure what you need, sometime it’s worth having a look? The list below may give you an idea of what’s what’s available, what to look for and how much it costs…

Ordering Parts – Examples of What You Can Buy:

Glow Plug Prices
Item Location
UK   Glow Plugs
Test Equipment
Glow Plug Tools
Jumper Cables
USA Glow Plugs
Test Equipment
Glow Plug Tools
Jumper Cables
AUS Glow Plugs
Test Equipment
Glow Plug Tools
Jumper Cables
CAN Glow Plugs
Test Equipment
Glow Plug Tools
Jumper Cables
IRL Glow Plugs
Test Equipment
Glow Plug Tools
Jumper Cables
Disclosure: The links in this table are “affiliate links” This means we may garner a small commission (at no cost to you), if you choose to make a purchase.
Thank you for your support.

Other Glow Plug Videos:

How to Test Glow Plugs:

More Detailed Info:

More detailed information can be found on this page: Diesel Won’t Start When Cold – How to Fix Glow Plugs: (Opens in a new window / tab)

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