I measured resistance on all the glow plugs and they are all reading 0.3 ohms on my little Radio Shack digital multimeter.
You did remove the plug from the GP relay before checking the five GP resistances? If you don't they're all in parallel and a bad one won't show up. Such low resistance is difficult for most meters to measure accurately, and 0.3 ohms is half what each GP should be. -- Jim
