Stock anti-theft and aftermarket sub/amp

[Ru Dawg]

Interesting find here.
One day, I was showing a friend the type of RCA connectors that I used for my sub. Some doors were open, the key was not in the ignition. When I pulled the RCA's out of the jacks on my sub box, the stock alarm sounded!

Is this normal?

 

[Ru Dawg]

Anyone?

 

[airforcemook]

It probably is looking for a voltage drop somewhere in the electrical system, similar to if someone was to cut a bunch of wires trying to disable it.

With the plugs out there's no electrical loop, but that's still weird.

 

[Ru Dawg]

So are you saying that the factory anti-theft system monitors the patch signal coming off the deck?

I just realized I called the connectors above RCA lines....silly me!
They are bannana posts....speaker wire obviously!