I believe my car stereo ( the 8"x8"x3" metal box the head unit snaps to) is broken and i want to check if it really broken before i invest $ into a new one. so I called this car audio place and asked if they can plug in my stock stereo system that i pulled out of my car into their displays. they told me all this BS that they cant test it that way, the olny thing i can do is get someone else with the same exact car and plug it in to check if my car stereo is busted inside. ...any thought

PS can i just plug someones elses stereo into mine and see if music will play throught my speakers>?

 

"8"x8"x3" metal box the head unit snaps to" You've lost me... Are you talking about the power amp?

 

yes its the amp. I believe thats the part thats broken

 

Well I don't have the premium stock system with the amp, so I can't be of much help.

No doubt Jaguar used some obscure socket on the amp instead of the normal RCAs, so there might be some truth to what they told you about only being able to test on the same car. Could you take a photo of the connectors on the amp?