1. Go to Directed's website: https://www.directed.com/
2. In the top right corner, click on "Support".
3. In the "Search" bar, type "555l".
4. Click on the "555L - Remote Start System" link.
5. Under the "Documentation" section, click on the "Installation Instructions" link.
6. The installation instructions will open as a PDF document.
7. The wiring diagram will be included in the installation instructions.
Alternatively, you can also search for the "DEI 555l wiring diagram" on a search engine like Google. Some websites and forums may have uploaded or shared the wiring diagram.