Electrical circuits (BMW 3 Series E30 1982-1994: Electrical equipment: Electrical circuits)

Due to the large volume, all models of each year of manufacture cannot be taken into account. However, owners of cars from earlier years of production can refer to the wiring diagrams shown here, since the current changes concerned only parts.

The following are the general electrical circuit diagrams of the models: BMW 316i Kat., 318i Kat., 318is Kat., 320i Kat., 324d, 325i Kat, manufactured since 1990.

Examples of designations on circuit diagrams

1 Cross section, mm²
2 Primary color
3 Optional Braid Color
4 Terminal number
5 Terminal designation
6 Threaded connection (cable lug)
7 Round connector
8 flat connector
9 Round connecting pin
10 Flat connecting pin
11 Solder point or connector
12 Designation of a plug-in connection
13 Wires without cross section designation, have a cross section of 0.75 mm²
14 Supply element
15 Element available on the diagram
16 Terminal in serial wiring diagram
17 Only for vehicles with manual transmission

1 Cross section, mm²
2 Primary color
3 Optional Braid Color
4 Wire number
5 Terminal designation
6 Terminal connection (wire end galvanized)
7 Threaded connection (cable lug)
8 Round connector
9 flat connector
10 Round connection pin
11 Flat connecting pin
12 Supply element
13 Element available on the diagram
14 Weight
15 Solder point or connector
16 Shielding