I left the chair lift switch on in my dodge van. battery won`t take a jump, what could it be?

How old is the battery ? Next time you change the battery think about installing a dry deep cell battery from OPTIMA #8004-003 34/78 REDTOP® .

there is a point at which your battery will drain enough that it will not jump-start. you need to use a charger or take the battery out and take it to a shop and have them charge it for you.