The Ford Fusion door switch is a switch that catches and transmits the signal for opening or closing the door structure to the power supply. It is installed inside the driver's and passenger doors, in the luggage compartment niche. The end switch is directly related to the lock. A light indicates that it is working. If the door is left in the open position for a long time, the device begins to beep. It's worth thinking about repairs and other ways to fix the problem when the device stops working.
What is a door switch and why is it needed?
Repairing the limit switch on the door of a foreign car Ford Fusion is often more expedient than buying a new device. Its price varies from 650 to 1000 rubles depending on the manufacturer. Here are the main points you should know:
- The microsystem allows you to make sure that door mechanisms work correctly.
- Without a switch, the power supply will not receive a signal when an action is performed. This may cause the lock to malfunction.
- The switch operates as a make-and-break button.
There are positive and negative devices. Fords of any modification have positive instruments installed.
The operating principle is no different, but there are installation features.
The limit switch can be repaired if the damage is minor, for example, a wire coming out, blocking due to contamination, or the need for lubrication. In other cases, it is better to purchase a new part and replace it.
How to extend service life
Craftsmen are constantly coming up with new ways to extend the service life of factory elements. Some people put coins under the rubber band, fasten the parts with tape, or insert washers. To prevent the switch from freezing or becoming deformed, there are several effective techniques to consider:
- Spring insert.
- Replacing standard caps with elements from foreign manufacturers.
- Silicone Grease.
You should not assume that these actions will grant immortality to the limit switch, but these measures will significantly increase its service life.
Source
Typical breakdowns and their symptoms
If the door lock does not work on the Ford Fusion, then it is necessary to establish the cause of the malfunction. Basic moments:
- Dust, dirt or the element has not been lubricated for a long time.
- Oxidation and freezing occurred due to moisture ingress and concentrate ingress. An electrical leak may occur, or it may be caused by washing, precipitation, or sudden cold snap.
- Incorrect adjustment was made. High installation or too small stroke of this part.
- False alarm when dust or water gets into the gap between the contacts.
- Corrosion. Regular lubrication of the internal niche with an anti-corrosion agent will help prevent damage.
Classification by principle of action
There are three main groups of limit switches: mechanical, non-contact, magnetic. The main function of all these devices is to automatically disconnect the working mechanism the moment its moving part reaches the set position. These switches serve not only to open a circuit, but also to connect it.
The operation of the circuit in the end sensors is coordinated in two ways: by direct action on the moving contacts and by positional control of them. In the first case they are called contact, in the second - non-contact. An example of contact limit switches are sensors responsible for closing car doors.
Sensors of this type can not only turn mechanisms on and off, but also establish the position of the object being monitored. These include float switches, as well as sensors that determine the fuel level. The signal for their operation is a change in resistance corresponding to a certain level of liquid.
The disadvantage of contact sensors in the presence of mechanical moving parts is a relatively short service life due to ineffective protection from moisture and dust. The advantage is simple design, installation and operation. Contactless switches are much more reliably protected from external influences. Their resource is also longer.
Mechanical type limit switches
The control of limit switches of this type can be roller or lever. They are triggered as soon as the control mechanism in the form of a wheel, button or lever experiences mechanical impact.
In this case, the position of the contacts changes - they can close or open. The process is accompanied by a signal - control or warning.
Most often, limit switches have two contacts - open and closed. There are single end devices, but they are rare. In any case, there are contacts in each case, and a working diagram with their numbers is shown on the panel.
The design of roller VCs provides for switching off by pressing the actuator on a button in the form of a small rod. Since it is connected to dynamic contacts, at the moment of contact the supply circuit opens.
The difference between lever switches is that their movable contacts are connected to a small lever by means of a rod or a rod. The action occurs when the actuator presses this lever.
In addition to standard end devices, there are microswitches. They work on the same principle, but their adjustment during installation requires greater precision due to the small stroke. To increase the working stroke, they resort to such a technique as including an intermediate element in the circuit - a lever with a roller.
This type of switches is used both in production and at home. A large number of control units are used in the elevator design.
Among them is a switch in the form of a sensor that limits the minimum and maximum height of the elevator, signals a rope break, gives a signal to open the door and performs many other actions. There are microswitches on the doors of many apartments that turn on the light in the room when it is opened.
In automobiles, such mechanical end sensors are included in alarm and lighting circuits. Their feature is the presence of one input with a positive potential connected to it. The housing is the negative terminal, pressed against a metal element on the car body that is free of paint.
This element is connected to the vehicle ground by a cable. The main condition is that the switch should not come into contact with a wet surface. Connect the end sensors when installing a car alarm using a diagram. Their outputs can be installed both on the doors and in the interior on lighting fixtures.
To turn it on when the door is opened, and turn it off when it closes, a short circuit to positive is performed. If there is illumination of the interior ceiling and doors, a block of limit switches is used, which performs various functions. As a result of the block being triggered, important sensors are blocked when attempting to open the locks.
Features of contactless limit switches
One of the varieties of limit switches is their non-contact modification (BVK). The communication of the devices is configured to trigger when a specific object enters the sensitivity zone.
There are no moving parts in the device itself, and there is no mechanical contact between the object of influence and the switch element configured for it.
The BVK consists of the following parts:
- sensitive element;
- power key;
- component that analyzes the signal.
The distance at which the device begins to operate is set based on the modification of the sensor and the requirements of the process. The exclusion of both moving and rubbing elements significantly increases the reliability of these devices.
Contactless sensors, or proximity sensors as they are also called, have extensive functionality. There are two categories - switches and position sensors.
The first task of the BVK is to detect the position of an object. In addition, the sensor performs counting, positioning, separation, and sorting of objects. It can control speed, movement, calculate rotation angle, correct skew and perform many other actions.
In domestic conditions, contactless switches are still primarily used in lighting control. However, in the field of arranging Smart Home systems, it has a much larger scope and much greater prospects.
Sensitive devices are used in industry, in the transport industry, as an element of automation, and in oil refining. Based on the principle of detecting approaching objects, BKVs are distinguished between inductive, capacitive, optical, and ultrasonic.
Inductive proximity sensors
They are tuned to materials both metallic and amorphous. Among those reacting to metal there are magnetic and ferromagnetic options. Inside the sensor there is a core - metal or magnetized.
If we describe the design of such a sensor in more detail, it consists of a converter that includes a copper coil located in a ferrite cup. Its functions include redirecting the vector of electromagnetic lines to the front part of the switch.
The oscillator in the circuit can be either with a fixed negative resistance or any other type. The magnetic field lines are oriented perpendicular to the direction of the current flowing through the turns of the magnetized core.
Disabling the limit switch
The factory device is inserted into the rear, front door panels and trunk. There is a special elastic band on top, which is secured with a fastening screw. To disable the part, instructions are provided:
- The rubber element rises. The bolt is unscrewed.
- The limit switch is pulled out as far as its wiring allows. The rubber fragment is removed.
- The driver has access to two wires: one leads to the body part and the other to the door. Both are turned off.
After this, you can replace the part.
Replacement
To remove the limit switches, open the doors, then:
- remove the protective cover from the sensor by simply pulling it towards you.
- pry off the limit switch with a screwdriver
- remove the limit switches by snapping off the three latches
- disconnect the block with wires.
On some Lada models (for example, Lada Priora or Niva 4x4), the limit switches are attached to the body with a screw.
On the Lada XRAY the limit switch is located in the door lock and changes along with the lock.
Installation is carried out in reverse order.
Door switch repair
Only one Ford Fusion door should be open during repair work. The most vulnerable point is the wiring. Work is performed only with rubber gloves. To find a broken contact, there are two ways:
- To check the electrical wiring after disconnecting, one wire is connected, then another. The indicator will allow you to identify in which wiring the broken contact is hidden.
- Drivers resort to the help of “crocodiles”. This is the name of a car diagnostic device. They cling to the body of the car. The tip of the equipment carries out tangential movements to each wiring. Working devices will light up the indicator in green, and faulty ones will light up red or go out completely.
Next, the contacts are repaired. To replace electrical wiring, an aluminum contact with a cross-section of 1.5 mm² is used. After removing the faulty element and installing a new one, the functionality of the device is checked.
Everything you wanted to know about the Ford Fusion but didn't know where to ask
You too can become our partner
Good afternoon to everyone who is tormented by the problem of locking the car in the normal way. The driver's door switch tormented me for two years. In the last month, slamming the door stopped completely helping and I decided to remove the trim and look into the mikrika’s “eyes.” When I removed the door trim, I broke two pins. I understand that to get to the lock you have to remove the glass. I unscrewed the bolts of the inner panel, it couldn’t be removed easily, I was afraid to use force, I didn’t have the Internet at hand to read the lessons of experienced people. In short, I chose the Joy111 method, for which a huge THANK YOU to him.
The design itself looks like this:
To securely attach it to the connector, I used the smallest wire crimping lugs. 300 W incandescent lamp Socket with base (to stand) Plug with built-in switch (possible without it) Five meters of wire to easily reach the socket
Many thanks to the underground parking of the Alatyr shopping center in Yekaterinburg, where there is a working 220V outlet
Next, I removed the terminals from the battery to avoid consequences
Then he unscrewed the driver’s door connector and inserted the crimped ends into contacts 6 and 8 of the “sick” limit switch
I placed the lamp in a socket on the rubber mat of the driver's seat. I plugged the plug into a 220V socket. I turned on the switch on the plug. The lamp did not light up because the door was open and the lock was not latched. A screwdriver with a plastic handle latched the lock without touching any other parts of the car.
Let there be light!
Next, use the handle on the outside of the door to open the lock, as it were, the lock tongue is cocked. Use a screwdriver to imitate closing again. The lamp came on again. I repeated this procedure five times. Then I turned off the 220V, assembled the connector, connected the battery and Hurray!
The treasured light blinked from the remote control button without any problems, the central locking closed!
Just in case, the connection diagram, although it is simple
Attention! The diagram shows a lock, not a door contact group
The complete diagram with the door connector is here
To summarize:
There is no need to disassemble the door, just unscrew the door connector. Be careful not to touch the car body. Maybe there is no phase there, I didn’t check.
Issue price:
- Wire 2x0.75 mmmm 5 m = 65 rub.
- Plug with switch = 57 rub.
- Incandescent lamp 300 W = 60 rub.
- Ceiling socket = 35 rub.
- Wire end 2 pcs. = 2 rub.
TOTAL: 219 rubles
The time spent is about an hour with the purchase of the kit and the manufacturing of the assembly. I wish you all success! For Joy111 once again THANK YOU!
Source: www.fusionguru.ru
Burning the limit switch
After it has been possible to turn off the part, in some cases the element is burned. To operate, you will need a 500 Watt lamp. If the driver has never encountered such repairs, it is better to contact a service station. The following equipment will be required:
- AC source 220V, indicator screwdriver;
- incandescent lamp with E27 socket and a power of at least 200W;
- wire brand AVVG-2*2.5 - 2-3m, electric plug;
- Lamp socket with E27 socket, side cutters;
- a multimeter that will allow you to check the quality of the burn.
Replacement
To remove the limit switches, open the doors, then:
- remove the protective cover from the sensor by simply pulling it towards you.
- pry off the limit switch with a screwdriver
- remove the limit switches by snapping off the three latches
- disconnect the block with wires.
On some Lada models (for example, Lada Priora or Niva 4x4), the limit switches are attached to the body with a screw.
On the Lada XRAY the limit switch is located in the door lock and changes along with the lock.
Installation is carried out in reverse order.
