back-up lights always on on 1997 Chrysler Town & Country

drove the van about 23 miles when someone flaged me over and told me my back-up lights were on while driving.We have taken them out. Why and how do I repair them?

the switch is on the trans in the front down by the pan. it has one connector with 4 wires. you can get the switch at any parts store and you will need a socket to remove. when you get the new one, get a socket to fit it. be carefull when you remove it as trans fluid will leak during the change.