Insights, guides, updates

Blog for project car builders.

Practical guides, expert tips, and product updates to help you design, build, and wire with confidence.

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

Learn how to label automotive wires with heat-shrink markers, clear IDs, and a wiring loom plan that stays useful for years.

9 min read
automotive fuse box

Automotive fuse sizing made simple: choose fuse values for lights, fans, pumps, sockets, chargers, winches, and other 12V circuits.

7 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

RapidHarness is powerful harness software, but is it the best fit for a DIY build? Here’s how hobbyists should compare it with X/D Loom.

10 min read
X/D Loom vs SmartDraw

Choosing between a general diagramming tool and a vehicle-focused wiring tool? Here’s how X/D Loom and SmartDraw compare for real automotive electrical builds.

10 min read
Wiring Electrical Diagram: Complete Guide for 2026

Master wiring electrical diagrams for automotive projects. Learn symbols, types, and best practices for creating professional circuit documentation.

6 min read

Take it to the workshop

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