Wiring diagrams that
know how they're wired.

A purpose-built editor for automotive electrical systems — pin-accurate ECU libraries, design-rule checks, and a bill of materials that builds itself.

GM LS / LTFord CoyoteFord Modular Dodge Gen III HemiHolleyHaltech FuelTechAcesEFIOverland / 12V

The app knows the wiring

Not a generic diagram app.

Components carry real pin data, so the diagram understands connections — not just boxes and lines.

Pre-loaded ECU pinouts

Holley, Haltech, FuelTech, AcesEFI kits with verified connector pinouts. Drop the ECU, the connectors come with it.

Net & circuit tracing

Click a wire to highlight the whole circuit. Click a color to find every wire of that color across the diagram.

Design-rule checks

Short circuits, floating power/ground, undersized gauge, and fuse-vs-wire ampacity — flagged as you build.

Pin-level connections

Wires attach to real pin handles with color, gauge, and signal name — not arbitrary endpoints.

Dual-monitor pop-out

Pop the canvas into a second window and keep working — both stay in sync in real time.

Outputs from the diagram

BOM, wiring table, and cut list generate straight from what you've drawn, and update as you go.

Real wire properties

Every wire carries its data.

Color, stripe, gauge, circuit name, and routing live on each wire — and flow straight into your outputs.

  • Gauge in AWG (or mm²) on every wire
  • SAE color + stripe, signal name & circuit label
  • Orthogonal or curved routing, waypoints for obstacles
  • Wire terminations counted into the BOM
WIRING TABLE
IGN +12V18 AWG
MAIN GND14 AWG
INJ 1 Signal20 AWG
FUEL PUMP14 AWG
TPS Signal20 AWG

What you get

Everything on the list.

Canvas

  • Drag components from the library
  • Draw wires from pin handles
  • Orthogonal or curved routing
  • Waypoints, splices, branch groups
  • Net, pin & color tracing
  • Dual-monitor pop-out

Library

  • Holley, Haltech, FuelTech, AcesEFI kits
  • Deutsch DT/DTM/DTP — verified PNs
  • Sensors, injectors, coils, relays, fuses, PDMs
  • Overland / 12V: solar, lithium, DC-DC, inverters
  • Build your own custom components

Outputs

  • BOM — auto-updates, with PNs & quantities
  • Wiring Table — from/to, color, gauge, length
  • Cut List — lengths by gauge & color
  • Printable label sheet
  • Export PNG / CSV / PDF build sheet
  • Save/load .12vw — old files migrate clean

Pricing

Simple pricing.

Paid plans are still being set up. Create a free account to try the editor.

Free
$0
Account required
  • Canvas editor
  • Up to 10 nodes
  • Basic component set
  • ECU harness library
  • Export (PNG / CSV / PDF)
  • BOM & Cut List
Try it →
User
$19/mo
Annual = 2 months free · 1 seat
  • Up to 100 nodes
  • All Holley ECU kits — GM, Ford, Dodge
  • Haltech, FuelTech, AcesEFI kits
  • Deutsch connector library
  • BOM, Wiring Table, Cut List, Labels
  • Export PNG / CSV / PDF
  • Save & load .12vw files
Get Started →
Builder
$24.99/mo
Annual = 2 months free · 1 seat
  • Everything in User
  • Up to 200 nodes
  • Amplifiers, subwoofers, speakers
  • Tweeters & crossovers
  • Full car audio library
Get Started →
Shop
$99/mo
Annual = 2 months free · Up to 5 seats
  • Unlimited nodes
  • Up to 5 seats
  • Everything in Builder
  • Customer project management
  • Additional seats $25/mo each
Start Trial →

Paid plans not yet live. Create a free account and start drawing — upgrade when billing opens.