If you're like many thousands of Australians, you need to operate on a fairly tight budget and cannot afford to buy a new car. Consequently, you may have purchased a second-hand and fairly late-model version to save some money, but you've still got to be prepared to cover the cost of replacement parts. Sometimes these parts can be quite expensive themselves on the second-hand market due to their sophistication and you may find it a challenge to cover any issue should it arise. As an example, consider what would happen if the central locking mechanism were to fail. Would you know what to do and how can you best address this scenario?
The mechanism that powers a typical car door used to be a lot simpler in years gone by. People are looking for easier options all the time, however, and thus engineers and designers have created a complex alternative using electrical power and sensors.
In order for this to work properly, the central computer has to keep tabs on the multiple signals that it may receive from a variety of different locations. For example, signals could emanate from an exterior keypad, an unlock button situated within the cabin, a keyless remote or a central control. Also, you can activate the door mechanism by turning the key in the lock as you would have done in the 'old days' or by simply pulling up the knob on the inside of the door.
Once a signal is received, it has to be converted into a mechanical action. This is handled by a number of different components inside the skin of the door, including a power door lock actuator, a rack and pinion gear, a rod mechanism and a device that converts a rotary system into linear motion.
A Lot to Go Wrong
As you can see, there are a lot of individual components and therefore much margin for error. One or more of these components may be 'playing up' at the moment, and you need to be able to source a replacement at a reasonable cost.
Talk to the Recycler
Rather than trying to buy each part at a retail outlet, you should talk with an auto parts recycler instead. They have access to vehicles which have typically been damaged in an accident and where replacement parts like this are usually unaffected. Consequently, you should be able to buy all the components needed without paying an arm and a leg to do so.