2014 dodge journey9/2/2023 This step, performed using a specialized scan tool, is necessary to maximize battery life and prevent electrical system malfunctions. Some vehicles, for example some models of BMW, VW, and Audi, may require PCM programming to input battery parameters.The positive terminal is reconnected followed by the negative terminal. Anti-corrosion compound is applied to the battery terminals. The new battery is installed and the tie down system is reinstalled.In some cases, corrosion can be extreme and the cable may need to be replaced or wiring repaired. Cable ends and wiring are carefully inspected to ensure cleanliness and no corrosion.The battery tie down system is loosened and the old battery removed. The vehicles negative cable is removed from the battery, followed by the positive cable.When the battery is already completely dead, this step is unnecessary. A temporary power source might be installed to avoid the possibility of losing radio presets or stored data in the PCM while the battery is out.Disconnecting a car battery while the alternator is running can cause a voltage spike that will damage sensitive electronic components in the vehicle, such as the PCM.įast and easy service at your home or officeīacked by 12-month, 12.000-mile guarantee How Do Mechanics Replace The Battery Batteries should only be disconnected if the engine is off and the alternator is not running.If a load test on a battery reveals a significant reduction in the capacity of the battery to provide power, you should buy a new battery rather than wait for the old battery to fail completely. Generally, a car battery will have a service life of 4 to 7 years.If the polarity is reversed damage will likely occur to the vehicles electrical system. Batteries can only be safely installed from a positive terminal to positive wiring and from a negative terminal to body ground. Otherwise, the batterys positive cable can be shorted to ground or the positive and negative posts can be directly shorted. Insulated tools should be used to attach cabling to battery terminals.
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