jl 250/1 problem

Ok, i've recently installed a 250/1 into my '01 landcruiser. I kept the stock h/u and added a loc tapped into the RED / white and BLACK / YELLOW wires after the factory jbl amp. The amp is set for signal sensing turn on. Now, it plays fine in the car, but the problem comes when i turn the car off. The sub's spl goes through the roof. The keys arent even in the ignition and it has monstor power. The bass seems to build like a stampeed when i turn off the car...its like a tidal wave, but gaining spl instead. What gives?

That is odd... How does your stereo turn on without the keys in the ignition? Wouldn't you have to turn them to ACC to play it?"I'm finished!" - Daniel Plainview

sedate, the keys are used in turning it on, but when i turn it off, i can take the keys out prior to the subs spl building....sorry if that was unclear

fixed, had to run a wire for the remote power instead of using the signal sensing. thanks