Mazda 3 Fix Alarm Going Off Randomly

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Fix your Mazda 3 alarm going off spontaneously. Mine is a 2010, but it should be the same for 2008-2012.
Forscan tutorial: • Checking the AU with F...
Removing the door panel: • 2010 2012 Mazda 3 Hatc...
Door switch internals: • Door Light Switch in D...
Applying approx 0.2A of current through the closed door switch sensor should be enough to remove the oxidation. Make sure to cycle the door switch a bunch of times until the resistance consistently reads low.
If you use a 9V battery, you'll want to add a resistor of approx 45 ohms (9V/0.2A = 45). The switch should be able to handle a fair bit more current just fine (the original source I read used 0.6A), but 0.2A seemed to work fine.

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25 май 2024

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Комментарии : 5

@Steveincorp 17 дней назад

It is super annoying when the car alarm goes off randomly. I found a note on my car last night to fix my car alarm, and it was signed the entire neighborhood. It was a very hot day, and I noticed the alarm did go off a lot more. I just unscrewed the hood latch sensor and left it hanging. Mazda 3 definitely makes it difficult to access these wires with all of these damn panels

@JoeLapenna 15 дней назад

I took my horn fuse out until I get mine figured out. lights still flash but no horn.

@mananjuneja9005 8 дней назад

@@JoeLapenna I am having the same issue and I took the horn out as well XD. Seems like a common issue with these second gens. Did you find the fix though ? My mechanic couldn't replicate it cause its very random :(

@KingOfOutpost 6 дней назад

@@JoeLapennawhat was the problem?

@JoeLapenna 3 дня назад

@KingOfOutpost When the doors get hot from the sun, the door latch heats up and the metal contacts since the door is open, setting off the alarm. The problem is figuring out what door it is.