I'm trying to hook up my 400 watt audio amp.. I think i've done everything right. I have it hooked up to my battery.. the remote cable attached to my stereo.. and now all i have to do is the ground cable. I cant get the red "power" light to come on.. even when the ground cable is touching metal... it will give a little spark and the power light will ficker for a second and then not do anything. What am I doing wrong!! I need to get this working!