Charger or batteries are dud, or short in the wiring, check all wiring for shorts, check to see if you can charge the batteries with a car charger one at a time, if they charge and hold that charge then you need to replace the charger, if they will not hold a charge or you have a similar problem with the car charger, then the batteries are dud and need replacing,
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Charger or batteries are dud, or short in the wiring, check all wiring for shorts, check to see if you can charge the batteries with a car charger one at a time, if they charge and hold that charge then you need to replace the charger, if they will not hold a charge or you have a similar problem with the car charger, then the batteries are dud and need replacing,