Question about 1995 Mercury Grand Marquis
The simplest method is to use a weak solution of baking soda and water. Mix it up in an old plastic cup, and using a cheap small paintbrush apply it to the terminals and top of the battery. It will create a whitish foam as it neutralizes the battery acid, and this can be washed away with a garden hose. Once the outside is clean, remove the battery terminals and give them a good cleaning, using a stiff wire brush or some sandpaper, so that the mating surfaces of the connectors are shiny. If the bolts are rusty or corroded, replace them. Once you've tightened up the newly-cleaned terminals back on the battery (do the positive first and negative last), give it one more application of the baking soda solution, then rinse well with water and either sun dry it or blow dry it with a hair dryer. Some folks then spray on a commercial battery terminal protectant; but if you clean the battery and terminals every time you change the oil, your battery will be happy.
Continued heavy amount of corrosion could indicate a leak in the top of the battery, venting the corrosive gas produced when the battery charges, so keep an eye on that. And lastly, if the battery is being overcharged by a defective voltage regulator then it will outgas and show corrosion.
Posted on Oct 20, 2013
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Posted on Jan 02, 2017
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