Vehicle Wiring Terminal Designations

Automotive Electrical Wiring Terminal Designations

The wiring designations are common in European cars, and can help when looking for specific wires and referring to wiring diagrams. This is a non-complete list of some of the main designations. The DIN 72552 standard is a system created to help technicians connect wires to automotive electrical parts as accurately as possible, which is especially important during repairs or when installing new parts. Instead of labeling the wires themselves, this system uses terminal designations (see list below) to identify the specific connection points on each device. Because a single wire can connect to terminals with different names at each of its two ends, there is no need to write these codes on the wires. If a part has so many connections that the standard labels aren't enough, manufacturers can use their own simple sequences of numbers or letters to organise them. Additionally, some specialised electrical machinery may use labels from the DIN VDE standard alongside these designations.

Terminal Designation List