Drop the code number in the comments. (e.g., "E-12" usually means "Radio link lost," but on a 2018 model, it means "Short to ground on the stabilizer leg.")
If your crane is mounted on a specific truck like a DAF, you may need a specialized connection diagram such as the DAF to Palfinger Wiring Diagram palfinger crane wiring diagram
. These diagrams typically cover power connections, safety interlocks, and remote control receiver wiring. Core Electrical Components & Structure Drop the code number in the comments