is mounted in the fuel tank in tandem with the right side fuel level
sender. The fuel pump delivers fuel at high pressure to the fuel
injection system. It consists of Fuel Pump Relay, Front Power Distribution Box, and Fuel Pump. A pressure regulator
maintains system pressure. The quantity of fuel supplied exceeds
demand, so excess fuel returns to the fuel tank via a return line.
The fuel pump is operated by a fuel pump relay located in the power
distribution box. The fuel pump circuit is protected by fuse. The
following schematic shows the 1994 BMW 318i Fuel Pump Electrical Circuit Diagram and Wiring Color Code.
Wiring Color Code:
BK >> Black
BR >> Br
own
RD >> Red
YL >> Yellow
GN >> Green
BU >> Blue
VI >> Violet
GY >> Gray
WT >> White
PK >> Pink
