RESOURCES USER GUIDE Detailed information on how to use your Guardian EPASS device. Click here installation guide Detailed information on installation of the Guardian EPASS. Click here WIRING SCHEMATIC This includes a diagram on the wiring schematic for the Guardian EPASS. Click here Preventative Maintenance & Troubleshooting Detailed information on installation of the Guardian EPASS. Click here can't find what you're looking for? Contact us to find exactly what you’re looking for. Contact us