General information and color coding of wires (BMW 5 Series E28)

General information

Since it is impossible to provide all the schematic diagrams for each year of production in this Manual, the most typical diagrams and those that are needed most often are provided below.

Before you begin troubleshooting any circuit, check the fuses and circuit breakers (if they exist), to make sure they are intact. Also make sure the battery is fully charged and check the wire connections (see chapter Routine car maintenance). When checking the circuit, make sure that all contacts are clean and that the terminals are not broken or disconnected.

Color coding of wires

BK	Black
BL	Blue
BR	Brown.
GE	Yellow
GN	Green
GR	Gray or green
GY	Grey
OR	Orange
PK	Pink
R	Red
RS	Pink
RT	Red
SW	Black
TN	Yellow-brown.
V	Violet
VI	Violet
W	White
WS	White
Y	Yellow