Testing a cable harness by hand is tedious and error-prone. That’s what this automated bench is here to fix.
The system runs on a Raspberry Pi 4, which handles the interface and test execution. I/O expanders allow a large number of lines to be checked in parallel. The logic catches the usual wiring issues — opens, shorts, swapped or inverted lines — and updates the screen in real time as the test runs.
The interface guides the operator step by step and gives clear pass/fail results. Ergonomics were a real consideration here: the goal was a test process fast and reliable enough for an operator with no deep technical background.