Electrical diagram of models «316», «318», «318A», «320» and «320A» (BMW 3 Series E21)

¹ Additional equipment.
² Only for vehicles with manual transmission.
³ Only on vehicles with automatic transmission.

Wire color designation:

BL — blue; BR — brown; GE - yellow; GN - green; GR — gray; RT - red; SW - black; VI - purple; WS — white; TR — colorless. The first letters indicate the color of the wire itself, and the second — the color of the stripe on the wire.