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I've noticed a few people on this site saying the Wellmans won't swell. When I replaced mine, I had two swollen ones - one came right out but I noticed the tip was bulging a bit, the other, was a pain. Lots of yanking with Vice Grips and cussing was involved. They were, in fact, Wellman 070's.

I'm a little confused. I set up my manual glow plug switch (in an otherwise stock system) with one wire going from the terminal where the blue wire used to be (as pictured above) and the other to a 12V ground on the dash (a screw under the cigarette lighter). I hear the relay click and the GPs...