Yes, it matters.
Like the power windows the door locks are DC motors, so if one wire is + and the other wire - then motor turns clockwise so window or door lock goes down.
If you reverse the power, so + wire is now - and - wire is now + then motor goes counter-clockwise then window or door lock will go up.
But will you hurt anything by reversing wires..............no, but you do want tail gate to lock not unlock when doors lock.
Which is which?
Don't know, you have the instructions
I would hook it up but leave one end with temporary hookup then test it, if it is reversed then reverse the temp wires and make the final connnection
Last edited by RonD; 06-28-2015 at 04:01 PM.