Electrical System

Secondary Lock

~1min read

The secondary lock is a housing securing mechanism (second locking mechanism) that secures all wires in one contact housing. If a secondary lock is installed at a contact housing, it must always be opened or removed using specified tool before releasing and pulling out individual crimp contacts. Secondary lock is distinguished by a different color from the rest of the contact housing. It simplifies recognizing the secondary lock and clarifies its function. The shapes of the terminal housings depicted here are only a selection which, as an example, should make clear the various functions of the secondary lock.

Example 1

Housing securing mechanism is released by removing a "comb"-arrow-.

Secondary Lock

Example 2

Housing securing mechanism is released by opening a "flap"-arrow-.

Secondary Lock

Example 3

Housing securing mechanism can be released by disengaging a "slider"-arrow-.

Secondary Lock

Test yourself

A quick Volkswagen Touran quiz: every answer comes with an explanation and a link to the manual page.