Why won't my Diplomat battery stay charged?

A car battery that needs to be jump-started every time is as good as dead. The battery may be too old. Or, you may have a habit of leaving your car doors open and the dome lights on during the night. Stop in for a free battery check at your nearest Firestone Complete Auto Care and get a handle on your car battery’s health.

What do you do with my old Diplomat battery?

We recycle it, taking care of both your car and the Earth.

How much will replacing my Dodge Diplomat’s battery cost if I get a DieHard battery?

Dodge Diplomat batteries can be affordable, especially when there's an available battery coupon. The best part is every DieHard battery comes with a free replacement warranty and extra coverage with DieHard Assurance.

What is the average lifespan of a car battery?

The typical 12-volt car battery may last three to five years, depending on the type of battery, the driving conditions, and how well the battery is maintained.

What is the white, crusty substance accumulating on my Diplomat’s battery post?

The white, crusty stuff that can accumulate around Diplomat car battery terminals is called corrosion. It is caused by a chemical reaction between the battery acid and the air, which creates a white, powdery substance that can build up on the terminals over time. Corrosion can interfere with the flow of electricity between the battery post and the car's electrical system, sometimes leading to poor electrical performance, difficulty starting, and even premature battery failure.

How do I clean a corroded Diplomat battery terminal?

Regularly inspecting and cleaning your battery terminals will help keep your Diplomat’s electrical system running smoothly. Before cleaning, reference your owner’s manual for instructions on how to disconnect the battery cables. Once the cables have been disconnected, gently clean the terminals with a mixture of water and baking soda, a wire brush, and a rag.

Where can I find a battery for my Diplomat?

Your local Firestone Complete Auto Care sells and installs Diplomat batteries in your neighborhood. Our Firestone Direct mobile vans can even come to you and do it! Learn more about mobile battery services.

1986 Dodge Diplomat Batteries

Get a New Dodge Battery

Get a Battery for Your Dodge Diplomat

Don’t let a dead battery stop you. Shop replacement car batteries for your 1986 Dodge Diplomat at Firestone Complete Auto Care.

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Battery Size & Replacement for 1986 Dodge Diplomat

Researching battery replacements for your Dodge Diplomat? Use this chart to find the right battery size and CCAs for your Dodge Diplomat.

Battery	Engine	Warranty		Cold Cranking Amps
34/78-4	V8/5.2L	Replacement 24 months	Performance months	800
34FT-2	V8/5.2L	Replacement 36 months	Performance months	800
34-AGM	V8/5.2L	Replacement 36 months	Performance months	740

BATTERIES
V8/5.2L - Battery: 34/78-4 - Warranty: Replacement 24 months, Performance months - Cold Cranking Amps: 800
V8/5.2L - Battery: 34FT-2 - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 800
V8/5.2L - Battery: 34-AGM - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 740

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Shopping for Dodge Diplomat Car Batteries

Sadly, your Dodge Diplomat won't last forever. Neither will its battery. The average car battery lasts three to five years. Don’t get stranded by your Diplomat’s car battery. Replace it regularly instead! Pay attention to clues that your battery is on its way out. A lagging starter, a blinking battery or check engine light, bloated battery case, corroded battery posts, or dim headlights can all signal that your battery needs attention.

Or, you can get a complimentary battery check at your nearest Firestone Complete Auto Care. With computerized testing we can see how much charge is left in your battery. Drop in for a free battery check and, if needed, get your Dodge Diplomat a replacement battery. Car batteries are one of our many specialties! Our technicians are well-acquainted with Dodge’s service specs for Diplomat battery CCAs and reserve capacity. Get help identifying the type and size of battery that matches your vehicle, and schedule a fast car battery replacement at your earliest convenience.

Is There a DieHard Battery for Diplomats?

We know what’s best for your Dodge Diplomat, which is why we only carry top-of-the-line replacement parts and batteries. Your vehicle needs a reliable, durable and powerful battery that can handle most extreme environments and weather conditions. DieHard Diplomat batteries surpass expectations and house the latest technology to fuel the growing power needs of new vehicles. A DieHard battery isn't an ordinary car battery. It's extraordinary. Buy a DieHard battery for your Dodge Diplomat and get behind the wheel with confidence. Why? Because performance will be there when you need it most. That’s why you should choose batteries from Firestone Complete Auto Care.

Caring for a New Dodge Diplomat Battery

Did you recently have a new 1986 Dodge Diplomat car battery installed? Great job! Give your new car battery the best start with proper care. turning off all of the lights when you leave your vehicle, limiting short trips, keeping the battery posts corrosion-free, and not playing the radio or using other electronics when the engine is turned off.

Answers to Your Diplomat Car Battery Questions

Firestone Complete Auto Care has answers to your top car battery questions. If you have a Diplomat-specific battery question, stop by your nearest store. Our expert techs have the answers you need.

Why won't my Diplomat battery stay charged? A car battery that needs to be jump-started every time is as good as dead. The battery may be too old. Or, you may have a habit of leaving your car doors open and the dome lights on during the night. Stop in for a free battery check at your nearest Firestone Complete Auto Care and get a handle on your car battery’s health.
What do you do with my old Diplomat battery? We recycle it, taking care of both your car and the Earth.
How much will replacing my Dodge Diplomat’s battery cost if I get a DieHard battery? Dodge Diplomat batteries can be affordable, especially when there's an available battery coupon. The best part is every DieHard battery comes with a free replacement warranty and extra coverage with DieHard Assurance.
What is the average lifespan of a car battery? The typical 12-volt car battery may last three to five years, depending on the type of battery, the driving conditions, and how well the battery is maintained.
What is the white, crusty substance accumulating on my Diplomat’s battery post? The white, crusty stuff that can accumulate around Diplomat car battery terminals is called corrosion. It is caused by a chemical reaction between the battery acid and the air, which creates a white, powdery substance that can build up on the terminals over time. Corrosion can interfere with the flow of electricity between the battery post and the car's electrical system, sometimes leading to poor electrical performance, difficulty starting, and even premature battery failure.
How do I clean a corroded Diplomat battery terminal? Regularly inspecting and cleaning your battery terminals will help keep your Diplomat’s electrical system running smoothly. Before cleaning, reference your owner’s manual for instructions on how to disconnect the battery cables. Once the cables have been disconnected, gently clean the terminals with a mixture of water and baking soda, a wire brush, and a rag.
Where can I find a battery for my Diplomat? Your local Firestone Complete Auto Care sells and installs Diplomat batteries in your neighborhood. Our Firestone Direct mobile vans can even come to you and do it! Learn more about mobile battery services.