Hey guys, cheers for any help, and sorry if I've posted this in the wrong thread, I'm not new to just commodores, but I'm a first-time poster! Here's the go - my VZ SV6 has recently been having battery troubles, the car seemed to run completely fine until I installed the aftermarket head unit. Now I'm not gonna lie, I'm new to cars, auto-electrical, and aftermarket modifications but I wanted to start somewhere, so feel free to talk in "slower" terminology Info: Car - 2004 VZ SV6 Commodore Head unit - Kenwood ddx4018bt Wiring kit - EZY FIT VY-VZ Commodore Was thinking I may have incorrectly grounded it as I connected the black wire from the EZY FIT kit, to the black wire from the head-unit instead of wiring it to the cars chassis. I attached a poor quality image because that's the highest quality the site would let me upload! Thankyou for any help you guys can offer!