still on going problem. Had the scanner cleared of all codes ran it for a week and the Glow plug codes keep coming on as before. All eight. The scanner was saying that there could be a short or open ground and some. I relooked at the GP module. I found the black plug loose due to the gasket seal in the plug had broke and was keeping it from snapping in. The green plugs big black and orange wire was coming out of the back of the plug. I think the lock tab was broke and it was pulling out and loose. I removed the gasket for now, hoefully I can just get a new with out having to buy the whole plug. I shoved the black/ orange wire in and shoved the water tight seal in good to hold it. I will have to redo the plug. Now to let it sit and wait for the oil and coolant temp to fall to about 50* and see how well the GP's work.