locked your appointed dealer or delco can unlock it for you. You may need proof of how you obtained it. if you know the sets history a previous owner may remember the code he used. flyingfox@people.net.au more...
find the neg terminal using the continuity or the low ohms select on the meter...1 meter lead goes to the metal body of the set and the other lead goes to one of the power leads WITH THE SET TURNED OFF when the meter responds to a contact and more...