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To open combination locks without a code, start by pulling up on the dial and turning it clockwise until you hear the lock click. Then, check what number you're at, add 5 to that number, and write it down. Next, set the dial to that number and turn it counterclockwise until you hear it click again. Then, write down whatever number you're at. Finally, set the first 2 numbers of the combination and then slowly turn the dial clockwise, testing each number as you go, until you find the third number and unlock the lock. To learn how to open a combination lock using a shim, scroll down!