░▒▓ Harness Schematic Library ▓▒░
Select a harness to view full wiring diagrams
Complete vehicle wiring diagrams recreated from FSM Section 8W. Covers ECU, engine sensors, ignition, fuse block, instrument cluster, doors, windows, lights, trailer tow, and more. OEM wire colors.
Original Chrysler / Mopar Factory Service Manual wiring diagram scans covering powertrain (PCM), power distribution, ground distribution, transmission, exterior + interior lighting, instrument cluster, audio, security, and accessories. Click any thumbnail for full-resolution view with zoom.
Complete system wiring diagrams from Mitchell source data. Engine performance (3 pages), charging, starting, transmission, ABS, anti-theft, data lines, instrument cluster, and overhead console. OEM wire colors.
░▒▓ XJ Quick References ▓▒░
Printable 4.0L quick-reference sheets by ECU era — opens the PDF
4.0L quick-reference sheet for the Renix era. Sensor specs, connector pinouts, and common test values.
4.0L quick-reference sheet for the OBD-I SBEC era. Sensor specs, connector pinouts, and common test values.
4.0L quick-reference sheet for the OBD-II JTEC era. Sensor specs, connector pinouts, and common test values.
Describe your no-start, misfire, or sensor fault. The AI guides you through pin-level voltage and resistance tests with clickable circuit code links directly into the diagrams.
Build and trace wiring diagrams from FSM scans. Import a scan as background, trace wires with Chrysler color codes, place components, and export interactive diagrams.
░▒▓ 3D Printables ▓▒░
Parametric STL generators for 3D-printable engine-bay parts
Pulley creator, hose reducer, tee fitting, elbow, and port cap — parametric in-browser tools that generate printable STLs for 4.0L engine-bay parts. Pick sizes, download the file, slice it.
░▒▓ DXF Cut Files ▓▒░
Downloadable DXFs plus in-browser generators for custom cut files
Build custom Milwaukee PACKOUT + MOLLE combo panels. Configure pocket rows, columns, MOLLE grid size, and corner holes — get a laser/plasma-ready DXF cut file instantly. Exact STL-derived pocket geometry.
Browse and download factory-style DXF cut files — Jeep XJ brackets, mounts, and accessory parts. Each entry includes a preview and optional material/dimension notes.
░▒▓ Suspension Tools ▓▒░
Link geometry calculators — learn the math, then design the setup
Design a triangulated or parallel + panhard rear 4-link and watch the geometry work through full travel. Basic mode walks you through it in plain shop language — guided measurements and a straight answer on how the rig will behave, plus what to move if you don't like it. Advanced mode gives you the full treatment: instant center, anti-squat, roll axis, triangulation, pinion change, and every formula with your own numbers in it. Presets for XJ/MJ, TJ/LJ/JK, Toyota, and full-size builds.
··· More Harnesses Coming Soon ···
Additional years & configurations · Custom harness shop coming soon