Rear speakers do not work with aftermarket stereo install

If the back works then the amp isn't the problem. Either the front speakers are shot or the h.u. or amp have bad xhannels...assuming it was installed correctly. Www.modifiedlife.com has an excellent resource of factory color codes for stereos.

Sounds like one of your connections are bad. Go through them again and be sure everything is secure. Also, definately check the fader and balance settings, could just be that the fader is set to front and balance is set to left. Also, why did you punch the first one?

2006 Toyota Corolla Car Stereo Wiring Diagram
Car Radio Battery Constant 12v+ Wire: Blue/White
Car Radio Accessory Switched 12v+ Wire: Gray
Car Radio Ground Wire: Brown
Car Radio Illumination Wire: Green
Car Stereo Dimmer Wire: White/Black
Car Stereo Antenna Trigger Wire: Black
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 (+): Pink
Left Front Speaker Negative Wire (-): Violet
Right Front Speaker Positive Wire (+): Light Green
Right Front Speaker Negative Wire (-): Blue
Car Audio Rear Speakers Size: N/A
Car Audio Rear Speakers Location: N/A
Left Rear Speaker Positive Wire (+): Black
Left Rear Speaker Negative Wire (-): Yellow
Right Rear Speaker Positive Wire (+): Red
Right Rear Speaker Negative Wire (-): White

connect the wires as indicated below

1999 Chevrolet Silverado C1500 Wiring, aftermarket stereo wire colors

Car Radio Battery Constant 12v+ Wire: Orange, yellow
Car Radio Accessory Switched 12v+ Wire: Yellow, red
Car Radio Ground Wire: Black, black
Car Radio Illumination Wire: Gray (Tape off) not used
Car Stereo Dimmer Wire: Brown (Tape off) not used
Left Front Speaker Positive Wire (+): Tan, white
Left Front Speaker Negative Wire (-): Gray, white/black
Right Front Speaker Positive Wire (+): Light Green, gray
Right Front Speaker Negative Wire (-): Dark Green, gray/black
Left Rear Speaker Positive Wire (+): Brown, green
Left Rear Speaker Negative Wire (-): Yellow, green/black
Right Rear Speaker Positive Wire (+): Dark Blue, purple
Right Rear Speaker Negative Wire (-): Light Blue, purple/black

Hi, here are your factory wire colors/functions. Aftermarket stereos have a common set of colors, which should be in your installation diagram. The process is simplified if you purchase a wiring adapter for your vehicle. These are available for under $10 at most WALMARTs and auto parts stores or about any place that sells car stereos. In either case, I recommend you solder the connections or at least use crimp terminals. If you have any more questions, please let me know--I've done a lot of stereo installations.

2001 Toyota Tacoma Car Stereo Installation Guide
Car Radio Battery Constant 12v+ Wire: Blue/Yellow
Car Radio Accessory Switched 12v+ Wire: Gray
Car Radio Ground Wire: Brown
Car Radio Illumination Wire: Green
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 (+): Pink
Left Front Speaker Negative Wire (-): Violet
Right Front Speaker Positive Wire (+): Light Green
Right Front Speaker Negative Wire (-): Blue
Car Audio Rear Speakers Size: N/A
Car Audio Rear Speakers Location: N/A
Left Rear Speaker Positive Wire (+): Black
Left Rear Speaker Negative Wire (-): Yellow
Right Rear Speaker Positive Wire (+): Red
Right Rear Speaker Negative Wire (-): White

Check the right wiring diagram for all speakers...



Hope this help; TY for using Fixya (remember cmment and rated this).

i found this online, not sure if its correct because on mine i found a purple wire.....

Car Radio Battery Constant 12v+ Wire: Red
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: Brown
Car Radio Illumination Wire: Blue/Gray
Car Stereo Dimmer Wire: N/A
Car Stereo Antenna Trigger: Blue
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 (+): Blue
Left Front Speaker Negative Wire (-): Brown/Blue
Right Front Speaker Positive Wire (+): Red/Black
Right Front Speaker Negative Wire (-): Brown/White
Car Audio Rear Speakers Size: N/A
Car Audio Rear Speakers Location: N/A
Left Rear Speaker Positive Wire (+): Blue/Green
Left Rear Speaker Negative Wire (-): Brown/Red
Right Rear Speaker Positive Wire (+): Red/Green
Right Rear Speaker Negative Wire (-): Brown/Black

1992 Cadillac Eldorado Car Radio Wiring Schematic
Car Radio Battery Constant 12v+ Wire: Orange
Car Radio Accessory Switched 12v+ Wire: Yellow
Car Radio Ground Wire: Black
Car Radio Illumination Wire: Gray
Car Stereo Dimmer Wire: Brown
Car Stereo Antenna Trigger Wire: Pink
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: N/A
Car Audio Front Speakers Size: 5 1/4′
Car Audio Front Speakers Location: Doors
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: 6′ x 9′
Car Audio Rear Speakers Location: Rear Deck
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

I hate to do it, but have to ask, who did the install? Chyslers have that floating ground set-up that has thrown even the best install guys into a fit. When I was doing them, I overcame that with aftermarket installs by running my own separate wires to speakers, and back to stereo. There are adapter plugs that are good for that available too.

Here it is.

1996 Ford Explorer Car Stereo Radio Wiring Diagram
Car Radio Constant 12v+ Wire: Green/Violet
Car Radio Switched 12v+ Wire: Yellow/Black
Car Radio Ground Wire: Black/Light Green
Car Radio Illumination Wire: Light Blue/Red
Car Stereo Dimmer Wire: N/A
Car Stereo Antenna Trigger: Orange/Blue
Car Stereo Amp Trigger Wire: Blue (If Equipped)
Car Stereo Amplifier Location: N/A
Front Speakers Size: N/A
Front Speakers Location: N/A
Left Front Speaker Positive Wire (+): Orange/Light Green
Left Front Speaker Negative Wire (-): Light Blue/White
Right Front Speaker Positive Wire (+): White/Light Green
Right Front Speaker Negative Wire (-): Dark Green/Orange
Rear Speakers Size: N/A
Rear Speakers Location: N/A
Left Rear Speaker Positive Wire (+): Gray/Light Blue
Left Rear Speaker Negative Wire (-): Tan/Yellow
Right Rear Speaker Positive Wire (+): Orange/Red
Right Rear Speaker Negative Wire (-): Brown/Pink
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