August 27, 2012 at 4:42 pm #30643
Hi Members'I have lost power to the ignition switch on my Farm-pro 254 Jinma.I have 12 volts to the 30 amp main fuse but the green wire of that circuit downstream of it is 0 volts..That downstream greenwire gets buried in the wiring loom.
Does anyone know of any available schematics for a fee or free for this model?
The wiring has little plastic number tags.Are the lower numbers(1, 2, 3, ect.) that are tagged to the larger sized wiring possibly primary circuits while the secondary wiring is labeled with higher numbers?
August 28, 2012 at 5:45 am #35031
Look up Johnstractor.com, he has a wiring diagram on there.The 12V power goes from the battery to the starter, the starter to the fuse panel, fuse panel to the key switch.Check your fuses and fuse box good
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August 28, 2012 at 1:54 pm #35028
You didn't say what year the tractor was so I am shooting a bit in the dark. Standing on the right side of the tractor next to the starter with the hood open you should see a large connector in the main harness. This feed everything in the dash area. Unplug that and look for a 10 gauge wire that may have gotten hot. On the later models the wire was white. You might find that the connector no longer makes contact on that wire. That will kill all power to the key switch. I have seen this many times on Jinma tractors.
August 28, 2012 at 11:52 pm #35032
These are the wires on my 284. Perhaps this will help you.
August 29, 2012 at 2:27 pm #35036
Thanks members,These are all great links and important pieces of info.Will let you know what I find.Don L.
August 29, 2012 at 10:42 pm #35040
“Secondary wiring” and “ignition switch” are both terms used in spark ignition engines where secondary wiring refers to the high voltage spark plug wiring, and ignition switch refers to the primary side of the ignition circuit. These are simply and generically called key switches. It helps to eliminate confusion where diesel engines are concerned.
Yuchai dozer, Mustang skid steer, Mitsubishi mini-ex, Dual Dozer w/twin laser receivers, '50 Ford COE transit mixer.
August 30, 2012 at 3:28 pm #35041
I found the problem.Twelve volts going into the 30 amp fuse,and zero exiting.The crimped wiring that holds that 30 amp fuse had loosened and was not making contact.I simply leveraged the fittings more closely so that portion of the fuse made contact.
Because of everyone's help I fixed my problem plus accumulated some valuable electrical data.Thanks again,Don L.
August 30, 2012 at 7:58 pm #35044
Thanks for the info. I hate when a thread just disappears never knowing what happened. And happy endings are always good too.
July 30, 2017 at 2:26 am #47122
OK It’s 5 years later, and this thread was a resource to me.
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