Bring vintage wiring diagrams back to life — in colour, in vector, and runnable.

In development — coming soon.

The factory wiring diagrams that came with a 1958 Sprite, a 1915 Model T, or any other pre-war or early-post-war car are usually a faded black-and-white scan of a hand-drawn original. WireForge is a macOS app for recreating those diagrams as clean modern colour vector artwork — the kind of diagram you can actually read across the shop bench. Output is a portable circuit pack that opens in the Wire Harness Simulator.

The Wire Harness Simulator

Every WireForge circuit pack ships as an interactive electrical simulator for iPhone, iPad, and Mac. Open a diagram, zoom into the area you’re working on, and tap the switches and fuses to see what happens.

• Tap any switch to operate it — toggle a single contact, step a multi-position rotary, twist an ignition/lighting switch between off, side, and head.
• Watch wires light up and lamps come on as you change switch positions.
• Brake lamps, turn signals, headlamp main/dip beams — each filament glows independently so two-filament bulbs read differently at full brightness vs sidelamp.
• Press the starter and the dynamo (or magneto, depending on the car) starts spinning. The ignition warning lamp goes out when the dynamo catches, just like the real car.
• Flasher relays flash. The dashboard tell-tale lamp blinks in sync.
• “Cut” a wire to simulate a break and see what stops working — a diagnosis aid for tracking down ghost circuits before you climb under the dash with a multimeter.
• Blow a fuse on screen to see what loads it protects.

Why we’re building it

If you’ve ever tried to chase a wiring problem on a 60-year-old British or American car using a photocopy-of-a-photocopy of the factory schematic, you already know why. WireForge is the tool we wished existed when we started doing it ourselves — one that respects how the factory drew the diagram, lets you see the actual wire colours, and helps you reason about the circuit before you start cutting tape.

WireForge™ and Wire Harness Simulator™ are products of Skunk River Restorations. Currently in development; if you’d like to be notified when a beta is available, email wireforge@skunkriverrestorations.com.