I'm trying to install an aftermarket radio in my 2005 suzuki forenza, but it isn't working. The display on the radio doesn't even light up. I'm thinking that it is because there are some unused wires on the oem harness. There is no plug on the original harness thanks to a previous owner, so an adapter plug is out of the question, so i just need to know what wires should or should not be connected to what other wires. The ones which have no equivalent on the aftermarket radio are: illumination wire, and dimmer wire. If someone could provide some info, that would be awesome. The radio being installed is a sony cdx-gt57up.
