Hi, I am facing a problem with my car remote locking/unlocking system. My car has central locking but not remote, so the plan was to tap into the wires that send the signal to lock/unlock using a relay and a 433mhz remote to actuate it.
Now, upon actually starting the project, I'm faced with unknowns. I have meddled with arduino now and then, but I am by all accounts a complete noob, also at electronics in general.
I found a thread on a specific forum regarding the installation of an aftermarket lock/unlock kit, it shows which wires to tap into and to connect to the kit. However this does not help me, using the arduino.
It says the unlock brain (in this case the arduino) is supposed to tap into two lines (shown here) and send negative impulses to one for locking, the other for unlocking. The problem is I have no idea what negative pulses even are, as far as I knew this was just going to be a close a circuit by tapping into it with a relay and done.
Can anyone enlighten me on how I would produce and deliver negative pulses into those wires? Thanks