I lwanted to pass on my learning experience. I changed out the Y cable which was bad and then I started getting several codes. I replaced the MAP and the code cleared I replaced the MAF sensor the code cleared. I then still had P0670 bad Glow Plug Controller and P2270 bad O2 sensor. I replaced the Glow Plug Controllere and still had the same code and lights on the dash. I Ordered an O2 sensor and then started thinking what are the odds of a bad Controller perhaps it was not getting power and blew a fuse. I started looking here and found a link about the fuse. I then had the idea to check power to the module sure enough no power. The previous post had done the same thing. There are 2 wire under the nut for the Y cable I had left 1 wire off which fed the controller. All codes clear now and not sure why P2270 code was on, but now it is all clear. Great site to find issues