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It's Time to Hack Your Devices and Own Them
(www.youtube.com)
Share your self-made stuff and half-baked projects here.
Also check out !diy@beehaw.org
There is also a related XMPP chat.
I pulled the fuse on my car's DCM. Cost me a speaker that is on the same fuse, and of course Bluetooth etc, but I don't care about that. No check engine lights, easy to reverse if needed. But this depends on each model of car.