I have a '94 GMC 1500 P/U that has had the factory stereo disconnected and an aftermarket stereo installed in the center dash panel. (under the a/c vents) The problem is that I would like to have the factory clock and dash lights working. I do not know who installed the thing or what was disconnected to do the install. The wire loom for the factory head unit is just hanging loose in the dash. Any ideas as to what I need to reconnect in order to have these items functioning? Thanks.