kubota B21 Battery not keeping charge

[Clarkschapel]

The lights are not working on the tractor, just wondering if i might have a short in the system that is draining the battery, I can jump start the tractor and it runs just fine. the battery was purchased in 2014, i check the battery for water and it was ok. just not sure where to start looking for a ground or short in the system, i am wondering about the light switch selector. does anyone have a schematic of the electrical system on this B21. thank you for any input on this

 

[Egon]

Disconnect the battery after shutting tractor off. If it's good the next day start looking at the light system wiring.

 

[chim]

I had a similar problem with my Ford 1210. Turned out to be some dirt or corrosion in a plug connection. Battery and alternator were fine. Cleaning the connection did the trick.

 

[Clarkschapel]

thanks for the help, ill check those out next chance i get.

 

[100 td]

Does the charging lamp illuminate when the ignition switch is turned on? Does the charging lamp extinguish when the engine is running?

 

[100 td]

If your lights don't work, replace that fuse first as it also supplies the instrument cluster and also supplies the alt charge lamp which supplies power to excite the alternator.

 

[Clarkschapel]

I will take a look at that as soon as i can, thank you for your help, I will let you know what i find out.

 

[4570Man]

A tractor or vehicle with a working alternator can run after being started without a battery. This reminds me of a story. The alternator on my dads truck went out. The battery was soon depleted, and the truck died. It was on a bad stretch of road about 20 miles from home. He called a family member to bring us a generator, extension cord, and a battery charger. You can probably figure out what we did from this point.