Electrical Problems on Jinma 254

[RoddyMac]

I'm having troubles with my Jinma 254 2005 model tractor. My guages don't work now, and even my light switches. Where do I start? Fuses all ok.

 

[greg_g]

Instrument cluster or individual gauges?

//greg//

 

[RoddyMac]

Instrument cluster. yet...once in a while they actually work. Intermittent. But more often than not there's nothing.

 

[Diamondpilot]

Bad connection at the positive, negative (ground), or in the clusters circuit.

Chris

 

[RonMar]

Here is a schematic: http://www.tractorbynet.com/forums/...28-jinma-284-electrical-schematic-2005-a.html

I would start at the fuse panel and work toward the gauges. There is a large modular plug that connects all the wiring coming to-from the fuse block. All of the gauge circuits and all of the lighting circuits share a common ground point. If I recall correctly it is located on top of the fuel tank and bolts to the chassis there. I think there is also a modular plug at that point but I will have to go look at my tractor again to refresh my memory.

Good luck.

 

[greg_g]

Insects and moisture create problems in those instrument clusters. I've found nests in the pig tail connectors that - when wet - short individual wires. And once wet, corrosion starts to set in. I recommend you start by pulling the cluster and do a good cleaning of both halves of the connectors.

//greg/

 

[EE_Bota]

I like to:
Inspect, clean, and tighten all grounds.
Disconnect and reconnect all connectors 2-3 times each.

It is fast and often effective, and amounts to a tactile and visual inspection of the entire system. A person doesn't have to be particularly knowledgeable about electricity, so most people can do the work.