2012 Mustang Gt Fuse Box Diagram

Ford Mustang V6 and Ford Mustang GT 2005-2014: Fuse Box Diagram

Before the day of circuit breakers, when the power went off, you had to go to your fuse box. With today's cars, this is still true.

This article applies to the Ford Mustang V6 and Ford Mustang GT (2005-2014).

If an electrical component on your Ford Mustang suddenly stops working, before you start to worry about how much a repair might be, check your fuse box. Fuses are selfless little beings that would rather destroy themselves than allow damage to your car. A fuse costing a couple of dollars can save you thousands of dollars in repairs.

A fuse monitors the current passing to different circuits in your car. Basically, it's a piece of solder-like material design to allow current to pass through it, and melt when the power of the current (amperage) exceeds the limit designed into that particular fuse. If there is a power surge in the wire, the fuse will "blow" by not allowing the current to pass through it as the connection has been broken.

Figure 1. Burned-out (left) and good fuses (right).

So Many Colors, So Many Choices

Blade-type fuses were designed so you simply have to insert "Tab A" into "Slot B." Because the fuse box has to be limited in size to fit where it does, the fuses also have to be small and easy to remove and replace.

Because different electrical components in your car require different amounts of current, fuses come in all sizes of amperage. They can range in size from an 0.5 Amp that could be used on an sound speaker, to a 120 Amp fuse used for the big stuff like alternators and you battery. The are many amperage sized fuses in between.

Finding the Mustang's Fuse Box

The Ford Mustang has two fuse boxes. One is located under the hood, and the other is behind the front passenger's kick panel under the dash. This exterior box contains many of the high-amp fuses needed to run the engine. If you are trying to fix a specific problem, your owner's manual will tell you whether the fuse is in the exterior or interior boxes. The exterior fuse box cover lifts off. A fuse location diagram is on the inside of the lid, and also in your owner's manual.

Note

Fuse layouts may vary by model year. Disconnect the battery if you are examining fuses in the exterior box.

The interior fuse box is located underneath the dash behind the front seat kick panel wall on the passenger side. The latch is toward the front of the cover. Lift the edge and remove the cover. This exposes the cover of the interior fuse box. Squeeze both sides of this cover to pull it off and expose the fuses.

Is This A Bad Fuse?

Now that you know where the fuses are located, you can check underneath the appropriate cover or in your owner's manual for the location of the the fuse related to the problem that you're having. Before you try to pull the fuse out, it can be checked with a fuse tester, costing usually less than $10 including spare fuses. Too much current will break the connection in the fuse so that electricity will not pass through it. The tester has two probes on its end. These fit into two small indentations in the top of the fuse. If the fuse is still passing current, the light on the tester will glow. If it doesn't, the fuse is bad.

The next step is to pull the fuse and examine it. Unless you have very skinny fingers, or very long fingernails, you'll want to use a fuse puller (often included in the fuse box) or tweezers. This fuse tester pictured below has an integrated puller in its other end.

Note

If replacing the fuse does not repair the problem, you have to check for a short circuit or a wiring problem.

Your Fuse Box Roadmap

With dozens of fuses in your car, replacing them in the right spot with the right size fuse can be problematic. That's why Ford supplies you with fuse roadmaps. Diagrams for the positions and sizes of replacements are found on the covers of the respective fuse boxes and in your owner's manual. It is very important that blown fuses are replaced with the same amperage as the new one. Not doing this may cause severe damage.