2010 veracruz Stereo speakers "crackle/buzz". Starts sporadic then eventually permanent. Happens for all media types. this is third time. Dealership - First time they replaced stereo, 2nd time replaced amp. It's the very same problem this third time. (purchased Dec/10) - what are the chances of the same issue three times?

Under intake..good luck.

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Hi Daniel

You need to test & label all the loose wires.

Use a multimeter in Ohms mode to place a tickle of electricity to each speaker wire. you should hear each speaker crackle. (Multimeters only use a 9v battery internally)
Label each pair of wires for speakers.
Their color coding may help. Keep the negative & positive wires to the speakers correct so that the speakers all travel in a forward motion together or you will have distortion from one speaker that is out of phase with the others.
You will also have a permanent +12v line and a Ignition Key +12 volt line.
One keeps the station memory etc when the ignition key is off.

Cheers

Car Stereo Wiring Explained In Detail

Car Stereo Wiring Basics
How to Install Replacement Car Stereo

Try running a laser cleaning disk in it to clean the laser. Often times it has dust inside and distorts audio and video.

Car Radio Constant 12v+ Wire: Red
Car Radio Switched 12v+ Wire: Green/Black
Car Radio Ground Wire: Black
Car Radio Illumination Wire: Yellow
Car Stereo Dimmer Wire: Black/Orange
Car Stereo Antenna Trigger: Green
Left Front Speaker Positive Wire (+): Black
Left Front Speaker Negative Wire (-): White
Right Front Speaker Positive Wire (+): Blue
Right Front Speaker Negative Wire (-): Red
Left Rear Speaker Positive Wire (+): Black
Left Rear Speaker Negative Wire (-): Yellow
Right Rear Speaker Positive Wire (+): Green
Right Rear Speaker Negative Wire (-): Orange

Check all the connectors going to the radio and the speaker that is acting up. Also check the radio antenna ground if this happens when the just the radio is playing. Unplug them and plug them back in a few times, there may be a corrosion problem.

possible reasons:

Impedance mismatch
wiring is grounding out on frame/metal
speaker isn't OEM and is slightly "pinched" thus causing cone distortion

One of these three will be your issue.

Also, you may remove the speaker and leave it hanging with the wires attached. Knowing that no wiring is shorted and nothing is disturbing the cone, try running your stereo. Same crackling problem? It may be an impedance issue or you reversed the polarity on your speaker.

It will require some work but the solution is there if it was working before.

if your truck has bose the you probably blew the bose amp and will need to bypass it now to prevent speakers from making noise.

There is a major short somewhere,the hum you hear in the speaker
is the frequency of the DC electricity flowing through the speaker coils,do all four speakers hum or just one?Do you have a stock or aftermarket stereo?

The first thing I would do is pull the stereo out of the dash and unplug it . If the buzzing stops the stereo is bad get a new stereo. Its not hard to remove the stereo. Right above the cup holder there is a small cover you need a very small screwdriver to remove it . Under that is a few screws take those out then grab the plastic cover that runs around the stereo and pull towards the back window it simply pops off (No screws) After you remove that cover you will see 4 phillips head screws that hold the stereo in remove them. Last slide out the stereo there will be 1 plug with alot of wires that is the power and speakers . Unplug it . The other round plug is the FM antenna