I designed and built an interactive US trailer wiring guide focused on real-world diagnostics for 4-pin, 5-pin, and 7-pin trailer connectors. The project combines connector diagrams, trailer-side visualizations, troubleshooting workflows, and test-reference graphics into a single browser-based tool that helps users identify wiring faults faster and more accurately.
Key improvements included correcting inaccurate 5-pin wiring behavior, adding connector orientation views, creating multimeter and test-light diagnostic diagrams, building LED and incandescent-specific troubleshooting flows, adding zoomable visual references, and implementing an interactive symptom simulator that shows issues like no tail lights, one-side dim, blown fuse conditions, and fast flash directly on the trailer graphic. I also added saved state and shareable URL behavior so users can return to a diagnostic setup or send it to someone else.
If you want a slightly more polished WordPress version, use this:
Interactive Trailer Wiring Diagnostic Guide
Built a browser-based diagnostic tool for 4-pin, 5-pin, and 7-pin trailer wiring systems. The app combines interactive connector diagrams, trailer-side circuit visualization, troubleshooting workflows, multimeter and test-light reference diagrams, and LED/incandescent-specific testing guidance. I added zoomable visual callouts, persistent saved state, shareable links, and a symptom simulator that visually reproduces common trailer lighting faults such as no tail lights, dim one-side output, blown fuse behavior, and fast flash conditions. The result is a practical field-reference tool designed to make electrical troubleshooting faster, clearer, and more accurate.
