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The 2005 was equipped with or without and amplifier which do you have?
Okay, if you can remove your radio and let me know what kind of wires are plugged into it. Then we can go from there.
Thanks for the information. You do have an amplifier, that's what the DIN cable is for. Assuming that the 20 amp fuse (#1 in the left side of dash fuse block) the most likely cause would be the amplifier. It should be located under the passenger seat. I would start by looking at the connections on the amplifier making sure one hasn't become dislodged. There should be an 18 pin connector on the amp, if you have a voltmeter measure the voltage of pin #2 to ground and #10 to ground there should be 12 volts at both. Let me know what you get.