Welcome to the Jayco Owners Forums (JOF).
Most newer battery chargers cannot charge a battery that is completely run down which sounds like the case for you. You could leave the dead battery on the charger and then use jumper cables from another vehicle to your Colorado and once the charger kicks in, it should charge up the battery again. Older transformer type chargers would also work if you have one or have a friend with one, just charge it up an hour or two then go back to your newer charger. ~CA
__________________
2010 GreyHawk 31SS
|