Looking to help help a neighbor with a cold engine starting problem on a TC34DA. All he has told me so far is that it is electrical and he thinks it is something to do with the glow plugs. He has owned it since new and & the battery is good. I am hoping to find a wiring diagram before I jump into it. I have my 1520 & T1520 diagrams, but would like the correct wiring diagram if possible.