Q: What precautions should be taken when disconnecting a Ford Fusion's battery?
A: Always disconnect the cable from the negative battery terminal FIRST and hook it up LAST or the battery may be shorted by the tool being used to loosen the cable clamps. Some systems on the vehicle require battery power to be available at all times, either to maintain continuous operation (alarm system, power door locks, etc.), or to maintain control unit memory (radio station presets, Powertrain Control Module and other control units). When the battery is disconnected, the power that maintains these systems is cut. So, before you disconnect the battery, please note that on a vehicle with power door locks, it's a wise precaution to remove the key from the ignition and to keep it with you, so that it does not get locked inside if the power door locks should engage accidentally when the battery is reconnected! Devices known as "memory savers" can be used to avoid some of these problems. Precise details vary according to the device used. The typical memory saver is plugged into the cigarette lighter and is connected to a spare battery. Then the vehicle battery can be disconnected from the electrical system. The memory saver will provide sufficient current to maintain audio unit security codes, PCM memory, etc. and will provide power to always hot circuits such as the clock and radio memory circuits. To disconnect the battery for service procedures requiring power to be cut from the vehicle, loosen the cable end bolt and disconnect the cable from the negative battery terminal. Isolate the cable end to prevent it from coming into accidental contact with the battery terminal.
Q: How do you disconnect and remove a battery and Battery Tray on Ford Fusion?
A: To disconnect the battery, start by disconnecting the cable from the negative terminal followed by the positive terminal. Remove the battery hold down clamp and carefully lift out the heavy battery. If replacing the battery, ensure that the new one has the same dimensions, amperage rating, and cold cranking rating. Transfer the heat shield from the old battery to the new one. To reinstall, connect the positive cable first and the negative cable last. To remove the battery tray, follow the same steps as removing the battery. Additionally, remove the air filter housing and then remove the battery tray fasteners. Lift the tray out of the vehicle. Reinstallation is the reverse of removal.
Q: What are some important tips for maintaining your Ford Fusion's battery?
A: To make sure that your vehicle starts reliably, it is important to look after its battery. Ensure that you have safety equipment before working on the battery. Switch off the engine, take off negative cables, and prevent sparks or flames. Use safety gear when dealing with the corrosive acid. Look for damages, corrosion and clean the connections using baking soda solution. Check if the tray and clamp are in good shape and if necessary, relearn PCM strategy. Wash out the corrosions using water mixed with baking soda; repairing damaged parts using primer and painting over them is also an option.