BMW 3-ser. E21 Electrical System. Wiring Diagram
BMW 3-ser. E21 Engine Electrical System
Line resistor for coil. Alternator – removing and installing. Rotor. Trouble shooting – alternator. Starter. Exciter winding
BMW 3-series. E21 Instruments. Wiring diagram
Coolant thermometer, Speedometer, Clock, Fuel level sensor removing and installing
Complete Wiring Diagrams for the BMW E21 (1975–1983) 320/6, 323i. An indispensable resource for diagnosing and restoring the electrical system of your first 3 Series. Includes detailed wiring diagrams for:
- Fuel injection (K-Jetronic) and ignition systems.
- Detailed charging and alternator diagrams.
- Instrument cluster (Service Indicator Board diagrams).
- Fuse and relay diagrams for various model years.
- Lighting, ventilation, and relays.
- Location of all sensors and connectors in the engine compartment and interior.
This guide is the key to accurate and safe electrical repairs on your classic BMW.
E21 All Electrical System. Wiring Diagram
BMW E21 Circuit diagram for transistorized ignation K-Jtronic
19 Coil
c Warming-up regulator
20 Distributor
d Additional air slide
22 Engine plug
e Diode relay
27 Starter
f Fuel pump relay
a Thermo-time switch - g Ignition and injection (TSZ) control unit
b Starting valve - h Resistors
SW = black
RT = red
GN = green
BR = brown
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