Battery light keeps coming on John Deere 3046r

[mikestern]

For years, my battery light (on the dash) comes on on my JD 3046r. It doesn't kill the engine but it makes it so it stops. The JD dealer wasn't able to find anything wrong and it is particularly difficult because it is intermittent–it doesn't happen extremely often.

It seems that when it rains it pours and then this happens over and over again. It also, oddly enough, seems that I have no problems during long dry periods but problems start to begin again after a good rain (if I've left the machine out).

I've checked the grounds and connections best I can. I am getting good voltage at the battery and a little extra (14ish) when starting.

What else could be going on here? Thank you!

 

[dusty3030]

Load test the battery. If you don't have a good tester any auto parts store can test it for free.

Where the ground cable connects to the tractor (opposite of better end). Remove the fastener that attaches the ground cable to the tractor. Is there any corrosion or painted surfaces there that could cause a bad connection? Clean the wire terminal and the tractor side where it attaches to bare shiny metal. Coat with dielectric grease and reattach snugly.

Those are the the things I would check first.

 

[mikestern]

Hey Dusty, thanks!

Battery has been load tested. I've also checked the ground and done exactly as you describe with dielectric grease. No corrosion.

What's next to check? Thanks!