I purchased a radar detector today and wanted to hardwire it into my 94 civic ex, i figured after i cut an old adapter i had, ran a ground, and ran the hot to the 15a cig lighter/radio fuse it would work, but it doesn't come on, im using and old junkie radar detector i had lying around to test before i hook it into my real one, but it just doesnt come on, and its not the old detector b/c i can hook it up to the cig plug, and it comes on.. any ideas or what I should hook it too?? thanks