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Ford Mustang Electrical Fuse Replacement Guide
How to check or change a blown electrical fuse or a faulty relay in a sixth generation 2015 to 2022 Ford Mustang.

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2019 Mustang 2.3L I4
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Engine Bay Fuse Box
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Push In Release Tab
This automotive maintenance tutorial was specifically written to assist owners of the S550 sixth generation 2015, 2016, 2017, 2018, 2019, 2020, 2021 and 2022 Ford Mustang in checking or changing a blown fuse or a faulty relay in either the engine bay or the interior passenger compartment electrical panels.

(The 7th generation S650 Ford Mustang is supposed to be released in 2022 as a 2023 model year vehicle.)

Owners of other Ford and Lincoln vehicles such as the Fusion, Taurus, Escape, EcoSport, Flex, Expedition, Bronco, Ranger, Transit, F-150, C-Max, Fiesta, Focus, Edge, MKZ, Continental, Corsair, Nautilus, Aviator and Navigator may also find these DIY instructions to be helpful.

This 2019 Mustang is equipped with standard mini blade electrical fuses.

Please check your old fuses before purchasing new ones.

Newer Ford models may instead be equipped with low profile fuses or Micro2 fuses.

A plastic fuse puller tool should be included on the engine bay fuse block.

If the tool is missing, you can use a pair of needle nose pliers with rubber insulated handles to remove the old fuse.

The first two steps are to open the hood and then move to the left (passenger) side of the engine bay.

The primary engine bay fuse box is situated behind the passenger side headlight housing and in front of the shock tower.

Gently push in the tab on the front edge of the fuse box cover to release the retaining clip.



 

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Swing Open Cover
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Glove Box
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Passenger Side Kick Panel
Lift the front edge of the cover and swing it up towards the windshield.

The interior passenger compartment electrical panel is located in the front passenger footwell behind the right side kick panel.

Look under the glove box and locate the plastic cover close to where the front passenger's right foot would reside.

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Pull Open Front of Cover
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Interior Fuse Block
Gently pull open the front edge of the cover (located closer to the firewall and engine bay).
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Needle Nose Pliers
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Pull Out Old Fuse
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Old Fuse Removed
To check or change the old fuse, gently grasp it with the fuse puller tool or use a pair of needle nose pliers.

Pull the old fuse straight out of the socket.

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Standard Mini Blade Fuses
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Hold Up To Light Bulb
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Push New Fuse In Socket

To check the condition of the old fuse, hold it up to a light source.

If the thin metal strip (or "band") in the translucent plastic center of the old fuse looks burnt or broken, the old fuse is most likely "blown" and needs to be replaced.

If the thin metal bar in the middle of the old fuse looks intact, the old fuse is probably still in good working condition.

Since new fuses are so inexpensive, I recommend that it should still be replaced as part of your electrical issue troubleshooting process.

If you would like to add a hard-wired 12 volt power source for an automotive accessory such as a digital gauge, a smartphone charger, a dash cam, a back-up camera, a radar detector or an LED lighted Uber / Lyft ride sharing service sign, you can install an "Add-A-Circuit" fuse tap adapter (also known as a "piggy back fuse holder").

Use a digital multimeter to find either a "switched" or "hot / live" circuit depending on your needs for the device. A "switched" circuit will be off when the ignition is in the "Off" position and only supply 12 volt power when the ignition is in the "On" position. A constant or "hot" / live circuit will always supply 12V power even when the SUV's ignition is switched off. Be careful to not drain the 12V automotive battery if you choose a hot / live circuit that is always on.

If you suspect that a faulty relay is the cause of your electrical problem, the easiest way to troubleshoot the issue is to simply install a new relay of the same amperage rating.

Carefully pull the old relay straight out of the electrical panel and push in a new one of the same amperage rating.

You can also test the old relay with a digital multimeter tool.

Push a new fuse of the same amperage rating (e.g. 5A, 10A, 15A, 20A, 25 amps, etc) straight into the socket.

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New Fuse Installed
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Close Fuse Box Cover
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Close Interior Cover
Swing the fuse box cover closed and push on it to secure the retaining clip.

You should feel or hear the retaining clip "click" securely into place.

Carefully close the cover over the interior fuse panel.

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Kick Panel Secured
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Fuse Change Complete
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EcoBoost 2.3L Turbo I4

Test the electrical component that you were having problems with such as the stereo system, convertible roof, horn, headlights, tail lights, power driver seat, A/C system, power windows, interior lights, tail lights, backup camera, power door locks, etc.

If you are still having the same electrical issue, there might be a shorted out wire or the component itself has failed.

Don't forget to write down the fuse change in your car's service records.

For more, please check out all of the 2015-2022 Ford Mustang DIY Repair & Maintenance Guides.
 

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