Great question! Unfortunately location services cannot be turned on without the passcode. Did you lose the phone? Is this your phone? If this is yours, you can reset passcode by completing a restore on the original computer your phone was synced with. http://bit.ly/SzGLKs
Follow us on Twitter @VZWSupport
Thanks for the details lbhggh! Just to make sure we're on the same page, this is the Restrictions Passcode that has been forgotten, correct? Not the passcode to the whole phone (home screen)?
If the Restrictions Passcode has been lost, you can connect to any computer with the latest version of iTunes and choose the Restore option per the directions from the previous post. You will need to set the device up as a new iPhone. This will cause all data to be lost, however if you use the same Apple ID, any information stored to iCloud will be restored.
Follow us on twitter @VZWSupport