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WireViz — Cable & Wiring Harness Diagrams

WireViz documents physical cable assemblies, connectors, and pinouts using a clean YAML syntax. It renders professional wiring diagrams with color-coded wire representations.

!!! tip "Color codes" WireViz uses standard color abbreviations: RD (red), BK (black), GN (green), YE (yellow), BU (blue), WH (white), GY (grey), OG (orange), PK (pink), VT (violet).

Simple 3-Wire Serial Cable

A minimal RS-232 serial cable connecting TX, RX, and GND between two DB9 connectors.

%3 J1 J1 DB9 male 9-pin DCD 1 RX 2 TX 3 DTR 4 GND 5 DSR 6 RTS 7 CTS 8 RI 9 W1 W1 3x   J1:3:TX     1:RD     J2:2:RX J1:2:RX     2:BK     J2:3:TX J1:5:GND     3:GN     J2:5:GND   J1:e--W1:w J1:e--W1:w J1:e--W1:w J2 J2 DB9 female 9-pin 1 DCD 2 RX 3 TX 4 DTR 5 GND 6 DSR 7 RTS 8 CTS 9 RI W1:e--J2:w W1:e--J2:w W1:e--J2:w

Shielded Industrial Sensor Cable

A 3-wire shielded cable used for industrial field-bus connections — includes a shield drain wire tied to chassis ground.

%3 X1 X1 D-Sub female 9-pin DCD 1 RX 2 TX 3 DTR 4 GND 5 DSR 6 RTS 7 CTS 8 RI 9 W1 W1 3x 0.25 mm² + S 0.2 m   X1:5:GND     1:WH     X2:1:GND X1:2:RX     2:BN     X2:3:TX X1:3:TX     3:GN     X2:2:RX   X1:5:GND Shield   X1:e--W1:w X1:e--W1:w X1:e--W1:w X1:e--W1:w X2 X2 Molex KK 254 female 3-pin 1 GND 2 RX 3 TX W1:e--X2:w W1:e--X2:w W1:e--X2:w

Power Y-Splitter Harness

A power distribution harness splitting one Molex input connector into two SATA power outputs.

%3 Power_In Power_In Molex 4pin 4-pin 12V 1 GND 2 GND 3 5V 4 W1 W1 4x   Power_In:1:12V     1:YE     Device_A:5:12V Power_In:2:GND     2:BK     Device_A:2:GND Power_In:3:GND     3:BK     Device_A:3:5V Power_In:4:5V     4:RD     Device_A:4:GND   Power_In:e--W1:w Power_In:e--W1:w Power_In:e--W1:w Power_In:e--W1:w W2 W2 4x   Power_In:1:12V     1:OG     Device_B:5:12V Power_In:2:GND     2:BK     Device_B:2:GND Power_In:3:GND     3:RD     Device_B:3:5V Power_In:4:5V     4:BK     Device_B:4:GND   Power_In:e--W2:w Power_In:e--W2:w Power_In:e--W2:w Power_In:e--W2:w Device_A Device_A SATA power 5-pin 1 3.3V 2 GND 3 5V 4 GND 5 12V Device_B Device_B SATA power 5-pin 1 3.3V 2 GND 3 5V 4 GND 5 12V W1:e--Device_A:w W1:e--Device_A:w W1:e--Device_A:w W1:e--Device_A:w W2:e--Device_B:w W2:e--Device_B:w W2:e--Device_B:w W2:e--Device_B:w