Insights, guides, updates

Automotive wiring guides for project cars.

Clear explanations for planning circuits, reading diagrams, choosing components, and documenting a build.

Organized automotive wiring loom with fuse box and tools on a garage workbench

A clear wire-labelling system connects the marks on the harness to the circuit diagram, connector schedule, and future fault-finding work.

9 min read
automotive fuse box

A practical fuse-sizing process for project cars, without relying on a universal wire table or a fixed percentage rule.

4 min read
Automotive relays and wiring loom on a garage workbench

Automotive relay types explained: SPST, SPDT, 4-pin, 5-pin, changeover, latching, diode, resistor, and solid-state relays.

9 min read
Garage workbench with fuse box, relays, crimping tools, and an open camper van nearby

A practical comparison for builders choosing between manufacturing-oriented harness software and an automotive diagram editor.

4 min read
X/D Loom vs SmartDraw

A factual comparison of an automotive-focused wiring tool and a broad browser-based diagramming platform.

4 min read
Wiring Electrical Diagram: Complete Guide for 2026

A methodical way to trace an automotive circuit without confusing a schematic with the vehicle's physical wire layout.

4 min read

Get X/D Loom
on iPad.

Sketch looms at the bench with Apple Pencil, and every change syncs straight back to the web.

  • Free to download
  • Works with Apple Pencil
  • Syncs with the web
X/D Loom editor showing a battery, fuse, motor, and ground wiring diagram