The Nissan 720 was a compact pickup truck manufactured by Nissan from 1980 to 1986. It was an excellent truck that was known for its reliability and durability. If you are a proud owner of a 1984 Nissan 720, then you might be interested in the wiring diagram of the truck. A wiring diagram is a schematic representation of the electrical system of a particular vehicle. In this article, we will discuss the 1984 Nissan 720 wiring diagram in detail.
Introduction
The electrical system of the 1984 Nissan 720 consists of various components, such as the battery, alternator, starter, ignition switch, fuse box, and wiring harness. All these components work together to provide power to different parts of the vehicle. The wiring diagram is a key tool that helps mechanics and enthusiasts to understand the electrical system of the truck.
The 1984 Nissan 720 wiring diagram is divided into various sections, such as the engine compartment diagram, instrument panel diagram, interior light diagram, power door lock diagram, and so on. Each section shows the wiring connections and components of a particular system of the vehicle.
Engine Compartment Diagram
The engine compartment diagram of the 1984 Nissan 720 shows the wiring connections and components of the engine compartment. It includes the battery, alternator, starter, distributor, ignition coil, and various sensors. The diagram also shows the routing of the wiring harness and the locations of the fuses and relays.
The battery is the primary source of power for the electrical system of the truck. The alternator charges the battery and provides power to the rest of the electrical system. The starter is responsible for starting the engine. The distributor distributes the spark to the spark plugs, and the ignition coil generates the high voltage necessary to fire the spark plugs. The sensors provide input to the engine control module (ECM) to determine the proper operation of the engine.
Battery
The battery is a lead-acid type that provides 12 volts of DC power. It is located in the engine compartment on the passenger side. The positive terminal of the battery is connected to the starter motor and the fuse box. The negative terminal is connected to the chassis ground.
It is important to keep the battery terminals clean and tight to ensure proper operation of the electrical system. The battery should also be checked regularly for its voltage and electrolyte level.
Alternator
The alternator is a three-wire type that provides up to 60 amps of power. It is located on the passenger side of the engine. The alternator is driven by a belt connected to the engine crankshaft. The three wires of the alternator are the positive output wire, the negative ground wire, and the sensing wire.
The positive output wire is connected to the battery and provides charging current to the battery. The negative ground wire is connected to the chassis ground. The sensing wire is connected to the engine control module (ECM) to regulate the charging voltage of the alternator.
Starter
The starter is a two-wire type that engages the flywheel to crank the engine. It is located on the driver side of the engine. The two wires of the starter are the positive battery cable and the start signal wire.
The positive battery cable is connected to the positive terminal of the battery and the starter motor. The start signal wire is connected to the ignition switch and the starter relay. When the ignition switch is turned to the start position, the starter relay activates and sends a signal to the starter motor to engage the flywheel.
Distributor
The distributor is a mechanical device that distributes the high voltage to the spark plugs. It is driven by the engine and is located on the driver side of the engine. The distributor has a rotor that turns inside the distributor cap and sends the spark to the appropriate spark plug.
The distributor also has a vacuum advance that advances the timing of the spark according to the engine load. The distributor is connected to the ignition coil by a high tension wire.
Ignition Coil
The ignition coil is a transformer that generates high voltage to fire the spark plugs. It is located on the driver side of the engine. The ignition coil is powered by the positive output wire of the ignition switch and is grounded through the distributor.
The ignition coil has a primary winding and a secondary winding. When the current flows through the primary winding, it generates a magnetic field. When the current is interrupted, the magnetic field collapses, and a high voltage is induced in the secondary winding.
Sensors
The sensors of the engine compartment include the coolant temperature sensor, oxygen sensor, and throttle position sensor. These sensors provide input to the engine control module (ECM) to determine the proper operation of the engine.
The coolant temperature sensor measures the temperature of the engine coolant and sends the information to the ECM. The ECM uses this information to adjust the fuel mixture and ignition timing of the engine.
The oxygen sensor measures the amount of oxygen in the exhaust gas and sends the information to the ECM. The ECM uses this information to adjust the fuel mixture of the engine.
The throttle position sensor measures the position of the throttle and sends the information to the ECM. The ECM uses this information to adjust the fuel mixture and ignition timing of the engine.
Instrument Panel Diagram
The instrument panel diagram of the 1984 Nissan 720 shows the wiring connections and components of the instrument panel. It includes the speedometer, fuel gauge, temperature gauge, oil pressure gauge, and various warning lights. The diagram also shows the routing of the wiring harness and the locations of the fuses and relays.
The speedometer measures the speed of the vehicle and is connected to the speed sensor. The fuel gauge measures the level of fuel in the gas tank and is connected to the fuel sender unit. The temperature gauge measures the temperature of the engine coolant and is connected to the coolant temperature sensor. The oil pressure gauge measures the oil pressure of the engine and is connected to the oil pressure sensor.
The warning lights include the brake system warning light, battery warning light, and oil pressure warning light. These lights indicate the proper operation of the corresponding system of the vehicle.
Speedometer
The speedometer is an analog type that measures the speed of the vehicle in miles per hour (mph). It is located in the instrument cluster of the dashboard. The speedometer is connected to the speed sensor by a speedometer cable.
The speed sensor is located on the transmission and generates a signal according to the speed of the vehicle. The signal is sent to the speedometer to display the speed of the vehicle.
Fuel Gauge
The fuel gauge is an analog type that measures the level of fuel in the gas tank in gallons. It is located in the instrument cluster of the dashboard. The fuel gauge is connected to the fuel sender unit by a fuel gauge wire.
The fuel sender unit is located in the gas tank and measures the level of fuel in the gas tank. The fuel gauge wire receives the signal from the fuel sender unit and sends the information to the fuel gauge to display the level of fuel in the gas tank.
Temperature Gauge
The temperature gauge is an analog type that measures the temperature of the engine coolant in degrees Fahrenheit (°F). It is located in the instrument cluster of the dashboard. The temperature gauge is connected to the coolant temperature sensor by a temperature gauge wire.
The coolant temperature sensor is located on the engine and measures the temperature of the engine coolant. The temperature gauge wire receives the signal from the coolant temperature sensor and sends the information to the temperature gauge to display the temperature of the engine coolant.
Oil Pressure Gauge
The oil pressure gauge is an analog type that measures the oil pressure of the engine in pounds per square inch (psi). It is located in the instrument cluster of the dashboard. The oil pressure gauge is connected to the oil pressure sensor by an oil pressure gauge wire.
The oil pressure sensor is located on the engine and measures the oil pressure of the engine. The oil pressure gauge wire receives the signal from the oil pressure sensor and sends the information to the oil pressure gauge to display the oil pressure of the engine.
Warning Lights
The warning lights include the brake system warning light, battery warning light, and oil pressure warning light. These lights indicate the proper operation of the corresponding system of the vehicle.
The brake system warning light indicates a problem with the brake system of the vehicle. It is activated when the brake fluid level is low or when there is a problem with the brake system, such as a leak or a malfunctioning component.
The battery warning light indicates a problem with the charging system of the vehicle. It is activated when the charging voltage is low or when there is a problem with the alternator or the battery.
The oil pressure warning light indicates a problem with the oil pressure of the engine. It is activated when the oil pressure is low or when there is a problem with the oil pressure sensor or the oil pump.
Interior Light Diagram
The interior light diagram of the 1984 Nissan 720 shows the wiring connections and components of the interior light system. It includes the dome light, map light, and door switches. The diagram also shows the routing of the wiring harness and the locations of the fuses and relays.
The dome light is located on the ceiling of the cab and provides light to the interior of the truck. The map light is located on the dashboard and provides light to the driver and passenger. The door switches are located on the doors and activate the interior lights when the doors are opened.
Dome Light
The dome light is connected to the interior light switch by a wire. When the interior light switch is turned on, the dome light turns on to provide light to the interior of the truck. The dome light also has a switch that allows it to be turned on and off manually.
Map Light
The map light is connected to the interior light switch by a wire. When the interior light switch is turned on, the map light turns on to provide light to the driver and passenger. The map light also has a switch that allows it to be turned on and off manually.
Door Switches
The door switches are located on the doors and activate the interior lights when the doors are opened. The door switches are connected to the interior light relay by wires. When a door is opened, the corresponding door switch sends a signal to the interior light relay to activate the interior lights.
Power Door Lock Diagram
The power door lock diagram of the 1984 Nissan 720 shows the wiring connections and components of the power door lock system. It includes the door lock actuators, door lock switch, and door lock relay. The diagram also shows the routing of the wiring harness and the locations of the fuses and relays.
The power door lock system allows the driver and passengers to lock and unlock the doors of the truck remotely. The door lock actuators are located inside the doors and are responsible for locking and unlocking the doors. The door lock switch is located on the driver side door panel and allows the driver to lock and unlock the doors. The door lock relay is located in the fuse box and controls the power to the door lock actuators.
Door Lock Actuators
The door lock actuators are located inside the doors and are responsible for locking and unlocking the doors. Each door has its own actuator. The door lock actuators are connected to the door lock relay by wires.
When the door lock switch is turned on, the door lock relay sends power to the door lock actuators to lock or unlock the doors. The door lock actuators have two wires, one for locking and one for unlocking.
Door Lock Switch
The door lock switch is located on the driver side door panel and allows the driver to lock and unlock the doors. The door lock switch is connected to the door lock relay by wires.
When the door lock switch is turned on, it sends a signal to the door lock relay to activate the power to the door lock actuators. The door lock switch has two positions, one for locking and one for unlocking.
Door Lock Relay
The door lock relay is located in the fuse box and controls the power to the door lock actuators. The door lock relay is connected to the door lock switch and the door lock actuators by wires.
When the door lock switch is turned on, it sends a signal to the door lock relay to activate the power to the door lock actuators. The door lock relay has two contacts, one for locking and one for unlocking.
FAQ
| Question | Answer |
|---|---|
| What is a wiring diagram? | A wiring diagram is a schematic representation of the electrical system of a particular vehicle. |
| Why is a wiring diagram important? | A wiring diagram is important because it helps mechanics and enthusiasts to understand the electrical system of a vehicle. |
| What does the engine compartment diagram show? | The engine compartment diagram shows the wiring connections and components of the engine compartment. |
| What does the instrument panel diagram show? | The instrument panel diagram shows the wiring connections and components of the instrument panel. |
| What does the interior light diagram show? | The interior light diagram shows the wiring connections and components of the interior light system. |
| What does the power door lock diagram show? | The power door lock diagram shows the wiring connections and components of the power door lock system. |
In conclusion, the 1984 Nissan 720 wiring diagram is an essential tool for any mechanic and enthusiast who wants to understand the electrical system of the truck. The diagram shows the wiring connections and components of various systems of the vehicle, such as the engine compartment, instrument panel, interior lights, and power door lock. By understanding the wiring diagram, one can troubleshoot and repair any electrical issue that might arise in the truck. We hope this article has been helpful.
