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Welcome to


The purpose of this web site is to assist in the installation of alcohol interlock devices to a specific vehicle through wiring colour codes and visual understanding of where to find the required wiring and mounting positions for both relay and head. Nationwide interlocks is striving to give you the most up to date information as it comes to hand.


Where does the information come from

All information supplied on this web site has been provided by our service agents throughout Australia after phsical installation of the unit.

Use of

Use of this web site is restricted to use by Smart Start Interlock registered agents for the purpose of alcohol interlock device installation only. Any abuse of this site for thr purpose of any other electrical installation may result in cancellation of your access to this site.