Ill tell you what may be the problem, as i had the same one. Your factory stereo also probably has an amp for the deck speakers. Usually under the dash, under the glove box. So whats happening is your actually amplifying your amp, which is making it shut down. Just run rca's to the trunk. Im almost positive it will fix it. Because i already tried those splicers with no success. Or, if you have the stock stereo figure out which two, left and right speaker wires are for the back speakers but do this right were it comes out of the radio(headunit) itself,run speaker wire right off of that to the back and then use your splicers. So your basicly bypassing the factory amp. Either way one of those should fix the problem.
