Hobbies Cars & Motorcycles How To Prevent Corrosion in Electrical Connections Share PINTEREST Email Print Cars & Motorcycles Cars How Tos Buying & Selling Basics Reviews Tools & Products Classic Cars Exotic Cars Corvettes Mustangs Tires & Wheels Motorcycles Used Cars SUVs Trucks ATVs & Off Road Public Transportation By Matthew Wright Matthew Wright has been a freelance writer and editor for over 10 years and an automotive repair professional for three decades specializing in European vintage vehicles. our editorial process Matthew Wright Updated July 13, 2018 Your car has hundreds of electrical connections. These days, everything is controlled by some sort of electronic management. Each of these systems performs an important duty. Most of the electrical connections involved are well protected, but there are always a few that for one reason or another seem to be susceptible to corrosion. 01 of 03 Bad Electrical Connections This electrical connection is pretty horrific. Matt Wright If your car has an electrical connection that is bad, or a connection that you think could be susceptible to corrosion due to its proximity to the weather (especially plugs that are used to connect trailer lights), there is a simple way to keep them from corroding. 02 of 03 Dielectric Grease You'll need some dielectric grease and a q-tip or other applicator. Matt Wright` Lucky for us, corrosion has been an enemy of electrical connections for quite some time, and there is an easy, cheap solution to the problem. Dielectric grease acts as both a conductor of electricity and a shield against corrosion. Corrosion is caused by moisture coming into contact with the metal parts of anything electric. Because there is current passing through the metal connections - even if it's just a little - the connections attract and hold onto all sorts of little compounds. As these stuck compounds build up, they eventually break the connection between two electrical contacts. They do this by actually coming between the electrical lovers. Dielectric grease, when applied correctly, will prevent almost all corrosion from starting. That's why it's a good idea to be proactive and protect any connections that you think might become corroded over time. What You'll Need: Dielectric grease, package size depends on how much work you have to do. Q-tip or similar tool to use for application 03 of 03 Applying the Corrosion Protection Apply dielectric grease to the metal connections. Matt Wright Protecting your car's electrical connections against corrosion is quick and simple -- and cheap, just the way we like it. It's a good idea to disconnect the negative battery terminal when doing any type of electrical work on your car. First, you'll need to disconnect the plug or other electric components you will be protecting. If you're doing more than one connection, I suggest doing one at a time to avoid confusion. Most automotive plugs will only go into the proper socket, but it can still get a little confusing. With the metal connections visible, squeeze a small amount of dielectric grease onto the Q-tip. Rub the grease over the entire metal surface of each connection. You don't need very much to do the job, but be sure to get a good layer all over. Plug your connection back together and you are now protected from the green monster of corrosion.