Question about Alpine CDA-9855 CD Player
The cd player will turn on and you can use all of it's functions but when you have a cd in it registers the cd and acts like its playing the cd but no music comes out the speakers. the preout out puts work fine for hooking amplifiers but the speakers have no power at all. the cd player is in an 88 mustang cobra GT, i've checked fuses and all with a test light to all the wiring too. the manual says that the "power ic" option turns it on and off but it still won't work either way. your assistance is greatly appreciated
It's possible that you have a shorted speaker wire. If one of the speaker wires is pinched, grounded or shorted it will cause the deck's internal amplifier to shut down. The easiest way to check is with a multimeter's resistance function. Remove the CD player and unplug it. Set your multimeter for "resistance" or "continuity". Attach the black probe to chassis ground; you can use the black ground wire in the deck's harness, clean dash metal, or the outer ring of your cigarette lighter. Use the red probe to test each of the speaker outputs in the harness: white, gray, green and violet. If you find a speaker wire that shows any continuity with chassis ground, then that's the cause of the problem. A speaker with a damaged voice coil may also cause the deck to shut down. To test this, probe the positive and negative leads of each speaker and test the resistance between them. For example, to test the left front speaker you'd put the red probe on the white wire and the black probe on the white/black wire. Each speaker should read a minimum of 3 ohms of resistance. If you get a lower reading then it might be causing your problem. If you don't find a problem with any of the speaker wires, then chances are the deck's internal amplifier has failed.
Posted on Jun 09, 2007
If you had to connect the remote amp turn on lead from the headunit to the factory amp turn on lead you may find your problem there.
On many headunits there are 2 blue remote wires 1 for antenna and one for amp turn on. The antenna remote only supplies power when the radio is playing not when playing CD's. If you hooked the antenna wire to the amp trigger then the amps shut down when you play a cd. If that's not it let me know and I will research further.
Posted on Jan 04, 2008
the blue line from the radio harness does not have power when the cd or aux are being used and the amp is not turning on-wire the remote line from the amp to the red line and your amp will stay on and you will get sound
Posted on Mar 27, 2008
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