Repair Diagrams for 1990 Mercury Topaz Engine, Transmission, Lighting, AC, Electrical & Warning Systems

Learn how to repair a car or truck, install or remove parts, wire an engine, reset warning lights, replace fuel filter, fix auto body and more. Get Automotix DIY!

Automotix DIY provides automotive consumers and do it yourselfers; the most comprehensive repair information about 1990 Mercury Topaz car and truck repair procedures including Mercury engine diagrams, wiring diagrams, repair work estimating measures, technical service bulletins, auto body work guidance, starter & alternator replacement procedures, serpentine belt replacement procedures, radiator & hose replacement procedures, tune-up & drivability specifications, quick lube illustrations, preventive maintenance guide, engine light reset instructions, parts removal and install procedures, fuel filter replacement directions, component location diagrams, air filter locations & replacement instructions, a/c system specifications, and general auto service procedures. You don't have to be a car mechanic or technician to know how to fix your 1990 Mercury Topaz automobile. Try the Automotix DIY solution today!

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We have info for following modifications of 1990 Mercury Topaz

1990 Mercury Topaz 2.3 L4 GAS, CID:140, Fuel Injection, Aspiration:140, Engine VIN:, Desg:S
1990 Mercury Topaz 2.3 L4 GAS, CID:140, Fuel Injection, Aspiration:140, Engine VIN:, Desg:X

WIRING DIAGRAMS FOR 1990 Mercury Topaz AUTOMOBILES

OEM drawn wiring diagrams for most 1990 Mercury Topaz cars and light trucks sold in the U.S.

1990 Mercury Topaz 2.3 L4 GAS Wiring Diagram

Components on diagram:

Right Power Lumbar Compressor Motor

Left Power Lumbar Seat Switch

Left Power Lumbar Compressor Motor

Right Power Lumbar Seat Switch

1990 Mercury Topaz 2.3 L4 GAS Wiring Diagram

Components on diagram:

Horn

Exterior Lamps

Courtesy Lamps

Instrument Illumination

Power Windows

1990 Mercury Topaz 2.3 L4 GAS Wiring Diagram

Components on diagram:

Ignition Switch

Instrument Cluster

Ignition Coil

Tachometer

Coolant Temperature Sender

1990 Mercury Topaz 2.3 L4 GAS Wiring Diagram

Components on diagram:

Window Safety Relay

Right Front Window Switch

Left Front Window Motor

Right Front Window Motor

1990 Mercury Topaz 2.3 L4 GAS Wiring Diagram

Components on diagram:

Air Bag Diagnostic Module

Shift Indicator Dimmer Relay

Electronic Engine Control (EEC) Module

Main Light Switch

Oil Pressure Switch

1990 Mercury Topaz 2.3 L4 GAS Wiring Diagram

Components on diagram:

Trunk Release Switch

Trunk Release Solenoid

1990 Mercury Topaz 2.3 L4 GAS Wiring Diagram

Components on diagram:

Right Backup Lamp

Left Backup Lamp

Backup Lamp Switch

Backup Neutral Safety Switch

1990 Mercury Topaz 2.3 L4 GAS Wiring Diagram

Components on diagram:

Cigar Lighter

Horn Relay

Speed Control Switch Assembly

Horn Switch

Speed Control Amplifier

1990 Mercury Topaz 2.3 L4 GAS Wiring Diagram

Components on diagram:

All-Wheel Drive Relay

All-Wheel Drive Switch

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Get the Complete Technical Service Bulletins!

Access diagrams and repair information such as wiring diagrams, diagnosis and repair charts, manufacturer service bulletins, and OEM Part numbers of your 1990 Mercury Topaz vehicle.