In short, The quickest way to fix the pop noise coming from your speakers after you replaced your stereo is by installing a small voltage regulator on the after-market stereo harness.
The part you need is pretty cheap and reliable. There are a few other ways of fixing the pop noise, but they will fail pretty quickly.
We do not use those quick methods in our shop and we do not recommend you do it either.
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What Causes the Speakers To Thump?
When your amplifier was manufactured they determined it only needed 5 volts to do its job. So there is a control module in your Ford/Lincoln or Mercury that takes the 12-volt signal from your battery and drops it down to 5 volts.
The factory system does this well before the radio so that no sound can be heard. However, If the stereo that continues the 5-volt output is not present when to continue that 5-volt output it will resist the voltage at the amplifier.
The amplifier resisting 12 volts to turn on is what your hearing when you get that thump coming from your ford speakers.
How To Fix The Pop/Thump/Boom Noise?
Most commonly found on the SHAKER systems by Ford/Lincoln/Mercury can be fixed by reducing the voltage to the amplifier responsible for turning it on.
Installing A voltage regulator in Line with the aftermarket stereo harness will fix this. The Step-Down module we use is pretty cheap and quick to ship!
How To Install This Step-Down Module
Time needed: 20 minutes.
- Remove stereo
Remove your stereo so that you can begin wiring in your step-down module.
- Identify Your Wires
You will need your new stereos harness and the factory adapter harness in front of you to identify your ground wire and amp turn-on wires.
- Make Connections
Connect your connections by using the instructions that come with the Step-Down module.