What does an electrical relay do in a car?
What does an electrical relay do in a car?
Relays are switches controlled by electrical power, like another switch, computer or control module. The purpose of an automotive relay is to automate this power to switch electrical circuits on and off at particular times.
Where can I get a 2004 Ford wiring diagram?
Select the model diagram you need and view online. No need to download. 2004 Ford Wiring Diagrams We are proud to have the ability to make vehicle specific free wiring diagrams available on request. Select your Year, Make and Model. Then choose the wiring diagram that best fits the repair issue or problem.
Where does the power come from on a Ford EEC relay?
This voltage comes from the ignition switch. Power (in the form of 10 to 12 Volts) is always present in circuit 4 . This voltage comes directly from the battery positive terminal across a fusible link on the starter motor solenoid (on the fender). Ground is always present on circuit 1.
What is the low current circuit on a Ford EEC?
Every Ford EEC Power Relay has two basic circuits and for the purpose of our discussion, we’ll call them: A low current circuit. This circuit can be identified by the wires labeled with the numbers 1 and 2. The low current circuit is the control circuit that ‘closes’ or ‘opens’ the high current circuit.
Where is the fuse panel on a Ford Ranger?
The fuse panel is located behind the cover on the left side of the instrument panel. How to check the fuses? How to replace a blown fuse? Why do car fuses blow?
Where are the fuse relays on a Ford F150?
Locations and descriptions of the fuses and relays of the under-hood fuse/relay box for 1994-1995 Ford F150, F250 and F350 (gasoline engine only). The under-hood fuse/relay box is known as the Power Distribution Center in the Ford service/repair literature.
This voltage comes from the ignition switch. Power (in the form of 10 to 12 Volts) is always present in circuit 4 . This voltage comes directly from the battery positive terminal across a fusible link on the starter motor solenoid (on the fender). Ground is always present on circuit 1.
Every Ford EEC Power Relay has two basic circuits and for the purpose of our discussion, we’ll call them: A low current circuit. This circuit can be identified by the wires labeled with the numbers 1 and 2. The low current circuit is the control circuit that ‘closes’ or ‘opens’ the high current circuit.
What are the numbers on the fuel pump relay?
A high current circuit. This circuit can be identified by the wires labeled with the numbers 3 and 4. This is the circuit that delivers the voltage (and thus current) to the fuel injection computer (EEC Electronic Control Assembly), fuel injectors, fuel pump relay, etc.
