I checked all the glow plugs like it said in my trusty Haynes manual. It said to put the ohmmeter on the 200 scale. Well mine only has one scale, the 1K scale. So I tested each glow plug, and I got readings in the 100-200 range for all the plugs. So I guess all the plugs are bad? Is it common for all the glow plugs to go bad at once? Is it a possibility the preglow relay had something to do with all the bad plugs? Right no the car will not start (but cranks over). I'm guessing because of the glow plugs. No new electrical problems. They were all cleared up with the new battery.