Why Would the Battery Light Came On on a John Deere 455 Lawn Tractor?

Low Engine Speed

• If your John Deere 455 battery indicator light comes on, it could be from low engine speeds or low revolutions per minute. When the engine is running, it is constantly recharging the battery while the battery disperses its energy to perform its operations. Excessive idling, however, causes more voltage to leave the battery than what it’s taking in. It is recommended that you only operate your John Deere at above idle or full speed for maximum charging capability.

Fuel System

• If you are running your John Deere 455 above idle but have problems reaching high or maximum RPM, that will still affect the battery’s recharging needs. Inspect the fuel delivery system for any defects that could limit RPM. For example, a broken fuel pump, choke control or throttles that are out of proper linkage restrict the amount of fuel entering the combustion chamber. Clogged fuel lines or a clogged fuel filter also limit your engine’s RPM.

Bad Battery

• A bad battery can also cause your indicator light to come on. The 12-volt battery should have a warranty or owner’s manual that explains its lifecycle. The John Deere 455 requires the battery to have at least a 470 cold-cranking-amps rating. If the battery is beyond its life cycle or close to it, it might be time to replace it. Otherwise, test the battery for charge capacity if you have the equipment. If not, your local automotive service store should have battery testing equipment on hand.

Connection Problems

• Your battery might be weak if there are connection problems between it and the engine. Inspect the battery’s poles and terminals, which connect the positive (red) and negative (black) wires to the engine. If they appear corroded, clean them with a stiff wire brush and baking soda paste. Also inspect the connecting wires to see if there is obvious damage, loose connections or signs of electrical arcing. All of those factors can limit your battery’s charge strength.