could someone refresh my memory. does a bad glow plug show shorted or open. can't remember.

 

Open/ high resistance IIRC

 

Yep. Glow Plugs 101 Tutorial

 

don't know what I was thinking, should have known a open would mean no
current flow through it. What have you all been paying for them. think I paid around $8 bucks each last time I bought them. the motorcraft/beru ones.

 

That's about right, they're around $10 at RockAuto.