The following file provides detail yet comprehensive discussion on 1992 BMW E30 318ic electrical parts troubleshooting and wiring diagram. Herein the manual, electrical components which work together are shown together on one schematic. Within the schematic, all switches and sensors are shown "at rest".

 BMW E30 318ic Wiring Diagram

Index of content:
how to use this manual
wiring and electric parts symbols
systematic troubleshooting
power distribution
charge
start
injection electronics
brake warning system
antilock brakeing system (ABS)
power mirrors
central locking
power windows
seats
body electrical
ignition key warning/seatbelt warning
wiper/washer
instrument cluster
light switch details
headlights/fog lights

turn/hazard lights
park/tail/front marker lights
rear marker/license/trunk lights
back up lights
stop lights
interior lights
heating and air conditioning
A/C temperature control
A/C blower controls
A/C air delivery controls
A/C compressor controls
auxiliary fan
radio/antenna
malfunction
clock
component location views
splice location views
connector views
component location chart

Get and download the 1992 BMW E30 318ic Wiring Diagram and Electric Parts Troubleshooting here – source: bmw.ctcms.net