Video – How to Test Glow Plugs – The Supply Voltage & Timer Operation:
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.
Other Glow Plug Videos:
- Diesel Won’t Start when the Engines Cold – White Exhaust Smoke:
- How to Remove and… Where are they Fitted?:
How to Test Glow Plugs:
- With a Test Meter – The Complete Guide:
- Without a Test Meter – The Complete Guide:
- Without a Test Meter – (short version):
- Still Fitted in the Vehicle (Resistance):
- Removed from the Vehicle (Resistance):
- The Supply Voltage & Timer (Voltage):
- Measure the Continuity:
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)
