[DIY] How to add shock sensor to factory stock alarm
107,201
Published 2017-12-26
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In this video, I'll show you how I added a shock sensor to my factory oem stock alarm system. The factory alarm system only when the door, trunk or hood is open while the car is still armed. It does not go off when the glass is broken or if the car gets hit or when someone tries to steal your wheel. By adding a DEI shock sensor, anytime the sensor picks up a shock, it will trigger the factory car alarm. You still use the OEM remote and it cost much less than adding a aftermarket alarm.
This method is pretty much for all vehicles. The trigger wire can be either the hood switch wire or the door switch wire. A relay is used so that the shock sensor is off while the car is on and only activated when the car is off. The alarm will not go off until all doors, hood and trunk is closed.
I would recommend also adding a wheel lock to your wheels and adjust the shock sensitivity accordingly. When a thief tries to steal your wheels, the shock from them removing the lugs or wheels should trigger the alarm.
Factory alarm to stock alarm.
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#caralarm #shocksensor #wheeltheft
All Comments (21)
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genius man i was about to change my factory alarm to aftermarket ones but after watching this i'll just keep the stock and do this instead you deserve more subs man
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Thank you Jeff for taking my inquiry. I am pretty sure you like this add-on.
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Ive been searching for this for MONTHS! Thanx @DIY: Car Modz
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Thank you!!!!! It worked for my 2013 civic, took me a little while to figure out but once you start to put things together and test it worked!!! Again thank youuuuuuu!!!!!
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Very good tutorial dude! Also thanks for the hand drawn wire diagram. You rock.
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Genius Bro, best mod yet. I need that key fob cover too lol
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Thank you !! It took awhile for my 2019 TRD Pro to find the right wiring diagram but I used your wiring diagram for the sensor and the relay. I finally made it to work! Thank you!
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This was very helpful. For the 2017 WRX, the door sensor wire is blue and white near the left foot well cover. You can follow the main harness on the driver side to the footwell. There’s 2 identical wires. You’ll have to test which wire is tied to the door sensor. I tapped into the fog light fuse for 12v constant and for the 12v ignition, I tapped into the cigarette lighter fuse.
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Thanks for the diagram. That helps a lot. Sensor is always powered when ignition is off 30 to 87a. When a shock happens it grounds blue wire that triggers the alarm. That looks to alarm box like a door or hood opening. Ignition on relay powers on 85 to 86 coil pins, breaking power to sensor because now voltage is between 30 and 87a this is not hooked up to anything.
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This is wonderful, however, to make the circuit agree more with the spec of relay, I suggest using (85) as ground and (86) as ignition switch deactivation of the sensor. Best video I found on this hack, thank again!
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Thanks for the help Jeff! You're the man!
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You have the best tutorials! Very detailed and well presented.
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Great write up.. go fund jeff for his time and efforts!!! Hehe happy new year and this can save your wheels..
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thank you for taking the time to respond; now to find the right wire
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Hi, I bought all the items needed. How would I know if my vehicle has a negative wire trigger?. mine is hyundai elantra AD
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Hey question Do I have to purchase a separate relay beside the one my car has?
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Very cool video and appreciate that you provided. Just a quick question...assumed you used a relay with the ignition wire to only allow the sensor to be active when ignition is off (car parked), otherwise sensor would be triggering off and on while driving, etc. Please confirm. Thanks
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Hey I appreciate the video. Im doing mine on a 2019 Toyota Camry. The line is hard to get to. Can I instead tap into the Front left door fuse instead?
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Can you do a video of how to install this on a 10 gen Honda Civic.
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That's so helpful! Thanks for sharing!
