1 – Relay No
Indicates the location of the relay on the relay board.
2 – designation of the relay/control device on the relay board
The legend indicates the name of the element.
3 – fuse designation
For example, fuse #19 (10A) on the fuse holder.
4 – designation of the plug connection on the relay board
For example, contact 3/49a:
3 contact 3 in place of 12 relay board
49a contact 49a on the relay/control device.
5 – designation of the plug connection on the relay board
For example, A13 is a multi-pin connector A, pin 13.
6 – wire cross-section, mm²
7 – wire color
8 – embossed number on the white wire
Facilitates identification when there are a large number of white wires in one harness.
9 – designation of the connecting terminal
With terminal designation, which can be found on the original part. 10 – fault finding algorithm measuring point
The number in the black circle indicates a drawing or an algorithm for troubleshooting audi.
11 – hazard warning switch designation
12 – element designation
The legend indicates the name of the element.
13 – indication of the presence of a wire extension
The number in the square indicates the continuation coordinate.
14 – internal communication (fine line)
This connection does not exist as a wire.
15 – indication of the presence of a continuation of the internal connection
The letter indicates where the connection continues in the next element of the circuit.
16 – designation of the mass point
The legend indicates the position of the mass point in the vehicle.
17 – relay board with fuse holder
18 – cable
19 – chain coordinate