Insert the key into the cylinder and turn it to the ON position.
That 'plate' you see for the horn is held in place with a split ring. Press down on it and remove the split ring. Now pull the plug you see down by the lock cylinder with needle nose pliers. Next remove the screw holding the lock cylinder in place.
"Taking care of our veterans is a cost of war. If you can spend six trillion dollars sending people to war, you can spend a few billion dollars taking care of them when they come home"
Sen. Bernie Sanders (I-Vt.)
If what doesn't kill you, makes you stronger, I should be able to bench press a Grand Cherokee by now!