Need to Twist Tie 2 sets of Cable
For Sound
Orange Amp Control Connect to Power source (ACC red wire on the DVR Green Connector)
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Check if Car type is Correct
For Mustang Premium - Mustang Hi
For Mustang Base (OEM 4inch Screen) - Mustang Lo
Settings,
Advanced (8861 / 666888)
Car Type is - ?
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Mustang Premium - Check if Yellow Plugged is connected (should be on Main Harness)

Check if the Wire Position is Correct
Correct Position -

Wrong Position -

Make Necessary Position Change -

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Can also Check in Settings, More Settings, Sound, Volumes
Check if all sliders are to Max