Wires and cables, they all have something in common – they break or get lost behind a wall or in a groud.  Thus, cable locators are very popular test instruments.  Here the range varies from simple “find in a bundle” tone-and-probe locators, through “find behind a wall” wire tracers, to “find underground” cable locators.  You really need a tech support to find you the best solution for your needs, as there are very many choices of “cable locators.