Hi not too long ago I re-installed the original Harmon Kardon system in my 2003 RR. Since doing so I noticed the battery dies after a couple of days if I let my RR sit. To give some history, I purchased the RR a few months ago and it had a aftermarket radio (Kenwood) and tv screens in the head rest. The wires in the cargo area was hacked, I was able to get a doner RR and used the wiring to start my rebuild I also used the OEM radio. I double checked all of the wires and everything is as it should be, now the battery is dying and I am wonder how I can test to identify what is draining the battery. I thank everyone in advance for any help given.