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My tractor is a approximately a 2003 model. they call it an ‘older’ model. I purchased it 5/6 years ago with some of the gauges and switches not working or missing. I could start it with the ignition at the time, my light switches worked, horn button worked and turn signals worked. Over time the switches have stopped working due to corrosion or wear. I’m thinking I would like to rewire and replace all the switches and gauges that I bought from Circle G that were available. I want to do this over the winter so I have all replaced by the spring.
I have no idea how to read a schematic wiring diagram and some of the new switches have the ‘plug and play’ type of connections which the older model 254s do not have that type of hook up. Most of them are soldered connections. Not sure if wire colors of new gauges and switches match up with old ones. I will soon find out. It would have been nice if the Chinese made wiring harness’ so you could replace that. What do you think…am I over my head? think this is a worthwhile project? Or, should I try to hire it out? I think I will be ‘fishing’ through a lot of wires–I hate fishing 🙁
Will
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I hope you know how to use a vom, I think that you should look at each end of the harness first and see if the colors match with the new one, if so it is just a soldering iron and some heat shrink and time, if not it is time to find someone who is used to tracking wire thru switches and relays to give you a hand. good luck
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These tractors have really simple wiring. The only thing that I can think of that might get a little confusing is the alternator/regulator circuit. Relays can be a little confusing depending on how they are actuated, but they all work the same way.
Do you have a schematic?
Do you know how to test voltage and continuity?
You said you can’t read a schematic but these simple systems are the perfect place to learn. I would suggest doing a web search for “simple dc circuits” or some such. I would bet you will find all kinds of classroom style videos online.
You might also check a local trade school that might have some continuing education classes or adult classes at night. Also, another way to go might be a local high school, if you can find one that still teaches vocational ed classes.
If all else fails, a library should have plenty of good books on automotive wiring or how to read a schematic. Ask at the reference desk, they will help you.
I wouldn’t hesitate to tackle a complete re-wire of a Jinma and have threatened to do my own someday when I have the time. Already bought a new fuse block (not OEM crap) to do it right. My know how in wiring is all self taught. Just think of it as running a garden hose. The positive side of the battery is the faucet and the negative is the drain. The trick is to make all the water go where you want it, when you want it and to make sure it all goes down the drain with no leaks.
It is a little more complex than that, but not much, and it is a good way to get your head wrapped around following the traces in the schematic.
Best of luck and please ask questions. I may have a schematic for your tractor, or one close to it if you don’t have one.
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