Electrical Problems After Larger Battery Install - John Deere Gator Forums
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post #1 of 2 Old 08-12-2019, 04:12 PM Thread Starter
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Electrical Problems After Larger Battery Install

We have recently installed new batteries on all of our John Deere 860 Gators. We did this because we were having issues with the aftermarket light bars and larger stock headlights going out completely while we were stopped for a few moments. The lights would stay off for about 3-5 minutes before coming back on if you were still stationary and within seconds if you started to move the gator again. We also have a soil probe that takes 12V to run so that is also pulling from the battery. At the suggestion of our John Deere dealer we installed a larger battery as opposed to installing a two battery system (one battery for the Gator and one battery for the accessories.
Lights are wired through the wiring harness that is on the ceiling of the cab. This also houses the switch for the windshield wiper. I was not part of wiring the lights this way so I do not know if it is correct or not.

The soil probe is powered from the battery through a Busbar that is under the hood of the gator.
The new battery is an Optima 12V Battery with CCA 450 CA 575 AH 38 RC 66.
We have had to jump one 860 off, the other two we have at this location start fine but still have the issues with the lights.
The 860 that we have to jump off gave me a light on the dash that the manual says indicates an Engine Malfunction as soon as I tried to crank it after the new battery install. Then after jumping it off, the dash gave me two lights - EPAS Malfunction Indicator and an Operator Alert Indicator.

We have thought that it may be something to do with the alternator, but these 860s all have less that 200 hours on them. We are afraid that if we take them to our JD dealership that they will just blame the problem on the new battery or on the wiring we have done.

Has anyone else had issues like this after adding too many accessories? If you did, were you able to fix it and what seemed to be causing the issue?

Thanks for any responses
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post #2 of 2 Old 08-12-2019, 06:09 PM
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Join Date: Nov 2014
Location: PA
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It might be helpful if you published the current draw from the accessories being powered. It sounds like there is considerable electrical load, but there is no way to know without data.

2012 JD855D OPS Black Poly Roof, Deluxe Cargo Box, Front and Rear Protection, Power Lift, Front Hood Rack, Rear Screen (homemade), 800 Watt Inverter, 2500lb Winch installed in cargo bed, Front and Rear LED auxiliary lighting (4" square 27 watt), Front and Rear CV Guards, Koplin Side Mirrors
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