Land Rover Defender Workshop 1993 Rover Manual
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ELECTRICAL EQUIPMENT CHASSIS AND RADIO HARNESS CONNECTORS ST3408M 1. Gearbox over temperature switch connection 2. Main harness connection 3. Transmission low oil connections 4. Centre differential lock connections 5. Centre differential lock switch 6. Reverse light connection 7. Speed sensor connection 8. Radio supply lead 9. Rear speaker connection 10. Rear speaker and seat belt connections 11. Supply to split charge circuit, 110 only 12. Main harness connection 13. Radio fuses 14. Radio connections 15. Speaker connections 16, Rear light connections 17. Rear wiper motor connections, 110 only 18. High level brake light 19. Heated rear window connections, 110 only 20. Rear tank Connections, 110 only 21. Fuel tank cable connections 22. Fuel level indicator connections, 110 only 23. Fuel pump connection 24. Speaker connection 38 REVISED: OCT 1993
ELECTRICAL EQUIPMENT LOCATION OF RELAYS, TIMERS AND CONTROL UNITS DEFENDER 110 (ST3362M) Relay etc 8 circuit symbol Location 1 Rear screen relay module HR4 ) 2 Voltage sensitive switch relay module SC2 ) 4 Water temperature signal conditioner WT2 ) 5 Service reminder unit EM1 ) 6 Inertia switch EF9 ) 7 Flasher/hazard unit DF5 ) 8 Wiper delay unit FW3 ) 10 Lighting relay module LS2 ) 11 Evaporator relay module AC3 ) 12 Compressor relay moduler AC9 ) 13 Main relay module AC1 ) 14 Condenser fan timer AC7 ) 15 Fuel pump relay module EF8 ) 17 Diagnostic relay module MF16 ) 18 MFI ECM unit ECM ) 19 Warning buzzer unit AW6 ) 20 Front screen timer HF4 ) 21 Front screen relay module HF3 ) 3 Engine/brake warn light check unit WL1 ) behind instrument binnacle 9 Starter relay module ST6 ) adjacent dash fuse box 16 Main MFI relay module EF6 ) RH toe box area RH upper dash area See relevant circuit diagram 40 REVISED: OCT 1993
ELECTRICAL EQUIPMENT LOCATION OF RELAYS, TIMERS AND CONTROL UNITS DEFENDER 90 (ST3442M) Unit and circuit symbol Location Service reminder unit EM1 ) behind instrument binnacle Engine/brake warn light check unit WL 1 ) ) ) ) ) ) ) ) adjacent dash fuse box ) ) 1 Warning buzzer unit AW6 4 Diagnostic relay module MF16 5. MFI ECM unit ECM ) RH toe box area 6. Main MFI relay module EF6 REVISED: OCT 1993 41 2. 3.
ELECTRICAL EQUIPMENT CIRCUIT DIAGRAMS The circuits which comprise the electrical system are presented as a series of individual circuit diagrams covering a specific function, eg starter circuit, lighting circuit, audible warning circuit etc. To ensure continuity of terminology throughout the circuits, circuit symbols and abbreviations are consistent. Wire colour is as follows: B=black G=green K=pink L=light N=brown O=orange P=purple R=red S=slate(grey) U=blue W=white Y=yellow The first letter of the code identifies the wire main colour and the second letter identifies the tracer colour. FUSES The main fuse box is located within the engine bay, attached to the left hand side of the bulkhead. The fuse box has four fuses, designated A,B,C and D for the purpose of these circuit diagrams; see illustration for details of the fuses. All wires from the fuse box are coloured brown. The auxiliary fuse box is located below the centre of the dash. The fuse box has 20 fuses, designated 1 to 20; these are identified as F1, F2 etc in the circuit diagrams. The illustration and associated table details the circuits protected by the different fuses and the colours of the wires linked to the terminals. In addition to the main and auxiliary fuse boxes, in -line fuses are protected in the following circuits: R1-Radio amplifier feed-5A C16-Air conditioning fan -30A R2 -Radio trigger circuit-2A AC 17-Air conditioning heater relay-30A MAIN FUSE BOX SCHEMATIC FUSE A ALL IGNITION FED CIRCUITS CIRCUITS OR DASH FUSE SERVED inc dash fuses 3-4-5-16-17-18-19 B BATTERY FEED CIRCUITS inc. dash fuses 1 -2-13-14-15 DEFENDER 90 C LIGHTING CIRCUITS inc. dash fuses 6-7-8-9-10-11-12 D MFI-FUEL INJ. inc. dash fuse 20 42 REVISED: OCT 1993
ELECTRICAL EQUIPMENT DASH FUSE BOX SCHEMATIC DEFENDER 110 ST3385M MAIN DASH VALUE CABLE CABLE CIRCUIT SERVED BY FUSE FUSE FUSE COLOUR COLOUR IN OUT B 1 20A N P Aux. instrument; fog lights; horn: int. lights B 2 15A N P,PW Hazard lights; SRI light A 3 15A W G Reverse light: electric screen wash A 4 10A W G Dimming mirror A 5 10A W G Stop lights, direction indicators C 6 7.5A U UP Not used C 7 7.5A UR UB Right head lamp dipped beam C 8 7.5A UR UK Left head lamp dipped beam C 9 7.5A UW UO Right head lamp main beam C 10 7.5A uw us Left head lamp main beam C 11 5 A U R Left side lights C 12 5 A R RO Right side lights B 13 20A N NP Heated Windshield B 14 20A N NO Air conditioning B 15 5 A N NS Air conditioning A 16 5 A W G Rear screen wash/wipe A 17 10A WB NW Heated rear window A 18 10A W G Cigar lighter 19 5 A WO wo Radio A D 20 7.5A WP WU Fuel pump REVISED: OCT 1993 43
ELECTRICAL EQUIPMENT DASH FUSE BOX SCHEMATIC DEFENDER 90 ST3443 MAIN DASH VALUE ClRCUIT SERVED FUSE FUSE B 1 20A Aux. instrument; fog lights; horn; int. lights B 2 15A Hazard warning lights A 3 15A Reverse light: electric screen wash A 4 10A Heater blower motor A S 10A Stop lights, direction indicators 6 Not used C 7 7.5A Right head light dipped beam C 8 7.5A Left head light dipped beam C 9 7.5A Right head light main beam C 10 7.5A Left head light main beam C 11 5 A Left side lights C 12 5 A Right side lights B 13 20A Auxiliary B 14 20A Auxiliary B 1s 5 A Auxiliary 16 Not used 17 Not used A 18 10A Cigar lighter A 19 5 A Radio D 20 7.5A Fuel pump 44 REVISED: OCT 1993
ELECTRICAL EQUIPMENT MULTIPORT FUEL INJECTION (MFI) CIRCUIT DEFENDER 110 (ST3358M) EF1 Idle air control valve EF17 Fuel injectors EF2 Mass air flow sensor EF18 Fan control timer EF3 Engine coolant temperature sensor EF19 Resistor (manual transmission) EF4 Engine fuel temperature sensor EF20 Onboard diagnostic module EF5 Throttle position sensor EM1 Service reminder indicator unit EF6 Main relay module EM2 Vehicle speed sensor EF7 Canister purge valve EM3 Service reminder light EF8 Fuel pump relay module IB1 Instrument binnacle EF9 Inertia fuel shut-off switch IG5 Ignition coil EF10 Fuel pump ST2 Terminal post starter solenoid EF12 Malfunction indicator lamp ST5 Starter/ignition switch EF13 Heated oxygen sensor EF14 Heated oxygen sensor EF15 Tune resistor connector EF16 Data link connector AC24 Air conditioning connections F2 15 amp fuse, dash fuse box F3 15 amp fuse. dash fuse box F20 20 amp fuse. dash fuse box REVISED: OCT 1993 45