how can i my heater plugs on my vauxhall frontera 2.4 turbo diesel?

you have to remove them one at a time and then use a battery charger put black on main thread. red on smaller thread but do not hold them in your hand as they do get hot. if they glow red then they are fine or change them all they are only cheap and do have a life span of about 3-4 years hope this resolves you problem if no contact me at stu_morris@btinternet.com.....

stu
May 2007