2005 pass key,

have a 2005 venture, brother changed the passengers rear turn light. now the van wont start. checked the battery, pass key, fuses, light bulbs. everything points to the pass key, how to reprogram the pass key when the spare isnt available? or any other reasons for this to happen.

do you have the original key or keys that came from the dealer? do you have the owner's manual? i don't understand how changing the light affected the pass /key unless you had the battery cables off [both] and it de-programed itself. if you have the manual it has the steps to re-progam it back like you want as it has options you pick. try re-programing it.