Noise on rear speakers

pull the rubber boot back off the wiring harness in the crease of the drivers door and check for broken wires there. common problem due to the number of times these wires flex to allow the door to open and close

Hi there:
Check this on 2005 Chevrolet Trailblazer Car Stereo Wiring Chart...

Car Radio Battery Constant 12v+ Wire: Orange
Car Radio Accessory Switched 12v+ Wire: The radio harness does not provide a switched power source. Run a wire to the fusebox for switched power.
Car Radio Ground Wire: Black/White
Car Radio Illumination Wire: N/A
Car Stereo Dimmer Wire: N/A
Car Stereo Antenna Trigger Wire: N/A
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: N/A
Car Audio Front Speakers Size: N/A
Car Audio Front Speakers Location: N/A
Left Front Speaker Positive Wire (+): Tan
Left Front Speaker Negative Wire (-): Gray
Right Front Speaker Positive Wire (+): Light Green
Right Front Speaker Negative Wire (-): Dark Green
Car Audio Rear Speakers Size: N/A
Car Audio Rear Speakers Location: N/A
Left Rear Speaker Positive Wire (+): Brown
Left Rear Speaker Negative Wire (-): Yellow
Right Rear Speaker Positive Wire (+): Dark Blue
Right Rear Speaker Negative Wire (-): Light Blue

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2006 Ford Focus Car Stereo Wire Color Codes
Car Radio Battery Constant 12v+ Wire: Yellow/Green
Car Radio Accessory Switched 12v+ Wire: Orange/Black
Car Radio Ground Wire: Black/Green
Car Radio Illumination Wire: Orange/Black
Car Stereo Dimmer Wire: N/A
Car Stereo Antenna Trigger Wire: N/A
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: N/A
Car Audio Front Speakers Size: N/A
Car Audio Front Speakers Location: N/A
Left Front Speaker Positive Wire (+): White/Black
Left Front Speaker Negative Wire (-): Gray/Black
Right Front Speaker Positive Wire (+): White/Red
Right Front Speaker Negative Wire (-): Gray/Red
Car Audio Rear Speakers Size: N/A
Car Audio Rear Speakers Location: N/A
Left Rear Speaker Positive Wire (+): White/Green
Left Rear Speaker Negative Wire (-): Gray/White
Right Rear Speaker Positive Wire (+): White
Right Rear Speaker Negative Wire (-): Gray


I’m happy to help further over the phone at https://www.6ya.com/expert/jeremy_69f3cc28d95bf514

The fact that your speakers have only one wire, indicates that they are the old negative ground type. You will have to buy new speakers, or try and connect the negative wires of your speaker wires from the radio to the car body (chassis) and try that. Normally you will get a bit of static when you start your engine

considering that all the wires are hooked up right ,the HU is perfectly ok ,check whether the "Fader"is selected to the front speakers .

No use the head units wiring for the speakers use amp only for subs

hook your front speaker wires up to the A side and on the front of it make sure only the A speakers are playing but leave the rear speakers plugged into the B side then hit the listen mode button and you should be rocking

You need to attach the blue wire on the stereo harness to the blue and white wire on the car adapter harness. they installed a small amplifier to power the rear door speakers and unless you connect those two wires then the speakers will not work.

Sir,
I do not want to insult you in any way, but I must ask just in case it was overlooked! First check to be sure that the speaker settings on the stereo were not set all the way to the front. If that is not the problem, you can hook another speaker you know works to the wireing to the rear speakers to check to see if it is the speaker or the wireing. If you hear sound from the speaker you know works, then your speakers in the car are bad. If you do not hear sound, then it will be from the wireing. Next is the more difficult part. You will have to pull the stereo out and can splice into the wires. Hook the good speakers up to the splice and check for sound. make sure you know for sure the wires you splice into are for the rear speakers. If you still hear no sound, then it is more then likely a problem in the stereo itself. If you do hear sound then there is a problem in the wireing somewhere and may be easier to just run new wires to the rear speakers.

THE 4 WIRES SHOULD BE FROM THE REAR SPEAKERS THEY GET WIRED INTO THE SURROUND SPEAKER OUT POSTS ON YOUR AMP (MAKE SURE YOU DO NOT GO INTO SURROUND BACK THIS IS FOR 6.1 AND 7.1 SYSTEMS).WHAT ARE THE WALL UNITS? NEED MORE INFO TO TRY TO HELP.

HOPE THIS HELPED A BIT.

CABLE GUY