Can I eject changer after uninstalling system from vehicle ??

It depends on the position of the CD in the changer when the stereo was removed.
If all of the CDs are in the magazine, then you might be able to get the magazine out using a manual reject button (normally a tiny hole which you stick a paper clip into, like on a computer).
But if you were playing a CD when the stereo was removed, you will need to retract that CD back into the magazine first, which means connencting it to the power.
Bear in mind that because the multichanger is controlled from the head unit, you will probably have to connect the head unit back to the power as well.

Pitmonster
February 2009