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If a cable speaker is shorted to ground or (in your case) the short was on the casing the radio mutes the output to save the amp. So
remove all cables and put them back to the radio & connect the speakers one by one to see if it works or mutes again
check mute button, source knob/button, speaker selection knob/button while its playing a cd or FM radio. Also if you have connected headphones the speakers would mute. Check the speaker connections. If the speakers are powered you need to connect them to a power source. If all these fail to produce sound consult a technician.
If you have a DVD player AND an FM Modulator then this is not a OEM part, meaning it's not in your service manual. An Original Equipment Manufacturer part wouldn't require an FM modulator. This is an aftermarket part, hardwired into your vehicle and the fuse should be located under your dash near the main power harness coming from the ignition.
"Auto Muting" in the context of FM means the output will be muted if the signal is so weak it would result in mostly noise anyway. Interstation radio noise can be annoying and dangerous at high volumes.
Hi, I went thru user manual..there is no special way of wiring speakers.. pls check carefully the speaker connections again and the "speaker selector" too.. what about "MUTE" button ? it should be "OFF" ... and try to test it on FM radio first .. just in case ,if you need the soft USER MANUAL pls visit the URL below..
1. Do you have power to the unit. I assume yes.
2. Ensure the fader and balance is set to neutral to ensure you have output going to all the speakers.
3. Ensure the speakers are connected.
4. Ensure the speakers are not out of phase, if they are they will cancel each other out, and sound muted
5. Always test new model head units with a cd. not fm radio. Using fm radio on some head units will mute the sound if the station is not coming in clear enough.
6. Set your volume up a little, like on 15 or 20 (using the digital 40 level radios) (halfway in plain language)
7. Ensure the mute isnt on
8. If running through and amplifer, ensure the power, ground, remote, gain and phase are all correct.
9. Ensure rca input is going into the correct place on the amp
10. Ensure speaker output is actually connected to speakers.
hope this helps