How to check/test your glow plugs? 2 easy ways without removing them.

This is very easy ways of checking your glow plugs on a car without removing them. Please Subscribe for more videos like this at    / alexthegrumpyone   If you need anymore help, just let me know and I can even do it in few different languages : English, Portuguese, Spanish, Russian and Ucranian. Please Subscribe and give it a like for more helpful videos :) It would be nice to know that it is appreciated :) Thank you! Obrigado! Спасибо! Дякую! Gracias! Good luck from your Grumpy Mechanic ;) PS... Sorry for mainly using English Language, the reason is mainly that im working and doing everything in England.