How to Remove Battery Acid From a 2005-2009 Ford Mustang Battery

Open the hood and prop it open using the hood prop.

Locate the battery.

Using the 8-mm socket wrench, disconnect the battery terminals.

Disconnect the negative terminal first.

Disconnect the positive terminal second.

Remove the battery and place it onto a disposable rag.

Scrub inside and around the terminals using the battery brush.

Scrub until the dust is gone, or flush with the terminal.

Spray the terminals with the acid detector spray.

Wait for the spray to change colors.

Pour warm water onto the terminals and into the battery box.

Repeat steps 5-6 until the corrosion is no longer visible.

Dry the battery box and terminals using another disposable rag.

Remove the previous washers.

Scrub the battery terminal posts using the battery brush.

Spray the terminal posts with the acid detector spray.

Wipe the spray off once it changes colors.

Dry the terminal posts completely.

Spray the terminals with the battery protect spray.

Spray the battery protect spray onto the terminal posts.

Apply the terminal grease onto the new washers.

Place the new washers onto the battery terminal posts.

Place the battery back into the battery box.

Reconnect the terminals to the battery posts.

Reconnect the positive terminal first

Reconnect the negative terminal second.

Allow the spray and grease to air-dry for 5-minutes.