ldd8010 Posted May 22, 2009 Report Share Posted May 22, 2009 I am installing an F700 in an 04 Escalade. I have BOSE and ONSTAR so I am using the GMOS-04. My front two speakers are working great but when I plug my rear speaker outputs from the HU to the inputs of the GMOS-04, it kills all of the audio. If I plug the RCA connectors together with just the center pins touching, i get audio. As soon as the grounds touch all audio is killed. Does anyone know what may cause this problem? Thanks in Advance Quote Link to post Share on other sites
rareform Posted May 24, 2009 Report Share Posted May 24, 2009 bad gmos04 - yes it can happen, gmos 01 and 4 oth have had this issue in the past... Quote Link to post Share on other sites
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