Its used got it for free its temporary til friday

 

Check the harness to the deck, there may be two blue wires. One for remote and one for power antenna. Had the same problem with mine. If you do, switch to the other one and you should be good to go.

 

Haha that's probly it I tied one off and wired the other up thanks for the idea dude

 

No prob. Don't know much about xjs, but I've installed a ton of audio.

 

good point. although i think they both get power on ignition.

 

For some reason, one is constant on, the other is switched. For the life of me, I can't remember why.

 

try using the switched wire that goes to the aftermarket deck, that way if you turn the car off it should turn off. if it stays on then your amp is toast. I had a few kicker amps do that to me when i installed them new out the box. I was an installer for circuit city for many years and saw a few a year do that.

 

Or you can also just run your power control wire to a aftermarket switch
Thats what I did, you just have to rememeber to turn the switch off :P