When I had a 6.9, the "wait to start" lite would come on randomly, going down the freeway at 60 MPH. Of course, it would cook the glow plugs. About the second time that happened, I talked to a diesel mechanic- he started talking about hundreds of dollars to replace the sensors, etc.- then suggested I bypass sensors and just use a manual push-button switch for glow plugs. Ran #10 wire from the two big terminals of the box that fed the glow plugs, to a 30 amp push-button switch I mounted under the dash. Push it for about a count of 6 (a little more in cold weather), worked great, and I was able to quit funding the International Glow Plug Consortium.
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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