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Mazda Mazda6 Electrical Fuse Replacement Guide
How to check or change a blown electrical fuse or a faulty relay in a 3rd generation 2014 to 2018 Mazda 6 sedan.

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2016 Mazda 6 Fuse Box
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Press In Rear Release Tab
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Pull Off Fuse Box Cover

This automotive maintenance tutorial was specifically written to assist owners of the third generation (2014, 2015, 2016, 2017 and 2018) Mazda Mazda6 sedan in checking or changing a blown fuse or a faulty relay in either the engine bay or the interior passenger compartment electrical panels.

Owners of other Mazda vehicles such as the Mazda2, Mazda3, Mazda5, CX-3, CX-5, CX-7, CX-9, and the MX-5 Miata may also find these DIY instructions to be helpful.

The 3rd generation Mazda 6 is equipped with the relatively newer style of low profile mini blade fuses.

A white plastic fuse puller tool should be included on the underside of the engine bay fuse box cover.

If the tool is missing you could instead use a pair of needle nose pliers with rubber insulated handles.

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Fuse Location Diagram
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Engine Bay Fuse Block
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Driver Side Dashboard
The first two steps are to open the hood and then move to the right (driver) side of the engine bay.

The black plastic engine bay fuse box is located behind the air filter box and next to the 12V automotive battery.

Press in the release tab on the rear edge of the fuse box to release the retaining clip.

Lift the cover straight off the fuse box and turn it over.

There is a fuse location diagram on the underside of the cover and also another one in your owner's manual.

Remove the white plastic fuse puller tool from the underside of the cover.

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Plastic Access Cover
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Notch In Rear Edge
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Access Panel Removed
The interior passenger compartment electrical panel is located behind a plastic access cover on the driver's left side kick panel below the dashboard.

Insert your finger in to the notch on the rear edge of the access cover and gently pull it out of the kick panel.

There is a fuse location diagram on the underside of the access cover.



 

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Interior Fuse Block
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Place Jaws Over Old Fuse
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Pull Out Old Fuse
Squeeze the end of the white plastic fuse puller tool to open the jaws.

Place the jaws over the top of the old fuse you'd like to check or change.

Pull the old fuse straight out of the socket.

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Hold Up To Light Bulb
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Push In New Fuse
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Replace Fuse Puller Tool
To check the old fuse, hold it up to a light bulb.

If the thin metal strip in the translucent plastic center of the old fuse appears to be burnt or broken, the old fuse is most likely "blown" and should be replaced.

Push a new low profile mini blade fuse of the same amperage rating (e.g. 5A, 10A, 15A, 20A, etc) straight in to the socket.

If the thin metal band in the middle of the old fuse appears to be intact, the old fuse is probably still good. Since new fuses are so inexpensive, it should still be replaced as part of your electrical issue troubleshooting.

Replace the fuse puller tool in to its holder on the underside of the engine bay fuse box cover.

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Push On Fuse Box Cover
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Secure Retaining Clip
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Replace Access Panel
Lower the cover back in to place over the engine bay fuse box.

Push it down to secure the retaining clip.

Snap the plastic access cover back in to place over the interior passenger compartment electrical block.

Check the electrical component you were having problems with such as the radio, headlights, wiper blades, horn, power windows, tail lights, interior lights, A/C system, the license plate lights, etc.

If you are still having the same issue, there might be a shorted wire somewhere or you need to replace the faulty component.

If you suspect that you have a faulty relay, the easiest way to check is it to install a new relay. You can also check an old relay by using a multimeter tool.

For more, check out my other 2014-2018 Mazda Mazda6 DIY Repair & Maintenance Guides.
 

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