When i hook up my cd player...i hook everything up like its supposed to be..and when i turn the key on it powers up then shuts right back off...over and over...well i placed both the egnition and batttery wire straight off the battery and it works fine...like it will comeon..and everything...well i need to know why the egnition wire isnt workin what could be wrong..and if there is a fuse for that wire..i have a 1992 pontiac grand prix se..