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Message: [QUOTE="Bugman, post: 887831, member: 2289"] To check the relay you need a digital volt ohm meter. Before you turn the key on see what post you have voltage on. You should only have it on one large post. Turn the key on and check it. You should have voltage on both large post and there should be less than 0.3 volts difference between the two. If you don't have voltage on both large post check the small post, you should have voltage on one of them, if you have voltage on both of the while the key is on then you are not getting the ground signal from the PCM and will need to trouble shoot that. The PCM will keep supplying the ground for up to 2 minutes before removing it. To test the glow plugs use the digital ohm meter and follow the instructions with the meter to zero it out. Now on both valve cover gaskets there are two plugs. Each plug controls 2 glow plugs and 2 injectors, the glow plugs are the outside pins on each connector. Measure the resistance of the glow plug to ground, it should be between 0.6-2 ohms for it to be a good plug. The reason that starting fluid is bad is that you may end up with a glow plug setting it off before the cylinder is at the top of its stroke. If this happens it might end up trying to push the piston back down which could be catastrophic to the engine. There is a reason that you don't use it on a glow plug equipped engine. For the battery problem check the grounds also. [/QUOTE]

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