MazdaSpeed3 - Fuse Pinouts for Glove box & ECU Fuses (Quick Fuse Tap Info for Gauges)

PDFs attached for the Pinouts of the Glovebox and ECU Fuses.

For Gauge installation, here are some good notes on the Fuses to tap in order to get a constant 12v, a switched, and an illumination

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Glove Box Fuses

Using a fuse tap, I tapped the F43 fuse (cigar lighter) for the illumination and switched power. This will turn the gauge on and light it up when a key is in the ignition or the engine is turned on.

If you have a traditional gauge that needs switched and illumination wired separately, you can use the F43 cigar lighter fuse (switched power) and the F82 dash illumination fuse separately.

I tapped the constant power wire to the F75 fuse (drivers door locks) This allows the gauge control unit to have constant 12v-- required if you have a gauge that needs to save settings or remember warning/peak levels. If a constant 12v is connected to a switched source, it will lose all settings when the engine is turned off.

NOTE: The radio fuse is NOT a constant 12v source from this location (I learned this the hard way and had to rewire it to the door locks).