installed sub, now abs light on??

[stackz]

ok, I followed the instructions in this thread for installing my sub amp:

http://www.xoutpost.com/articles/x5/...ctory-amp.html

I tapped the same 12v switched wire as he did. I also used pics #6-8 as those were my harness connectors for sub wires.

amp/sub works fine but now my yellow brake/abs light is on and I've got a little yellow triangle exclamation point with a round arrow around it lighted up.

any guesses as to why?

I just used a random frame bolt for ground and I tapped power at the white covered box at the front of the wheel well. basically, batter cable runs from battery to the big terminal in that little box where the 200amp mega fuse is and I tapped power at that lug. shouldnt affect anything.

I'm going to unhook the 12v switched and see what that does...