Just got a new set of GP's from Kragen(Autolite) after pulling my old ones which were pencil-type. Tried testing each one individually on the pos terminal, not one got even warm... Then tried same on different car that has brand new battery, same thing...
Then tried the new ones to see if they would glow ----NOTHING!!!! Not even warm.
Any help/suggestion? I don't want to put in the new ones unless I can get them to glow hot.