Just because your switch is 2 years old doesnt mean anything.It could be broke or a wire connection somewhere going to it might not be working.Fuse holder might be melted or lots of things.Sometimes where the wiring harness plugs in to the steering column the wire gets hot there and doesnt make a good connection.A lot of times if the bulbs arent grounding any more,like something that old could be rusted bad and no ground wire,but I guess it wouldnt be a bad ground if the brake lights work.Just because you use the blinkers all the time it could be anywhere from the fuse box to the switch in the steering column.Since the brake lights work the wires from the steering column to the turn signals should be good.There is a plug in somewhere that goes to the back lights I guess that could be bad or unplugged partly.If its seperate from the brake and running lights.The turn signal wires ought to be green and yellow.I seem to remember that Chevrolet used the same wires for brake lights as turn signals.I could be wrong.If it has a seperate brake wire it will be red.You could make a real long jumper wire,long enough to go from the battery to the fuse box.Hook it to the turn signal fuse if it doesnt work,jumper to the flasher,if it doesnt work jumper to the steering column plug in for the green and yellow wires(might not be the same color before the switch),probably need 2 wires then,and if it doesnt work then,its the switch.Or you could use a test light and check for fire from the fuse box to the steering column.
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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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