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Hey guys. Looking for a little advice. I was attempting to replace the head unit in my father-in-law's car, and wasn't getting power for a bit. Now, the only way to get power is tying the red wire (ignition) and yellow wire (battery) together. However, when the engine is shut off, it loses all presets. I'm assuming it's a head unit issue right now, but could it be an issue with the constant flow from the battery? No known blown fuses, as I've already check them all with a 12v tester. Let me know where you think I should look. Thanks.
 

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What year is the car and the trim level to have an idea of what the car is equipped with.
 

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I was attempting to replace the head unit in my father-in-law's car, and wasn't getting power for a bit. Now, the only way to get power is tying the red wire (ignition) and yellow wire (battery) together. .
Wasn't getting power to the radio? You need to be more specific.
 

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The yellow is a speaker wire. The red is power. The dark green wire is your acc power.
 

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Car Radio Battery Constant 12v+ Wire: Red/White
Car Radio Accessory Switched 12v+ Wire: Dark Green
Car Radio Ground Wire: Black/White
Car Stereo Dimmer Wire: Gray
Car Stereo Antenna Trigger Wire: Pink

Left Front Speaker Positive Wire (+): Gray
Left Front Speaker Negative Wire (-): Tan
Right Front Speaker Positive Wire (+): Dark Green
Right Front Speaker Negative Wire (-): Light Green

Left Rear Speaker Positive Wire (+): Yellow
Left Rear Speaker Negative Wire (-): Brown
Right Rear Speaker Positive Wire (+): Light Blue
Right Rear Speaker Negative Wire (-): Dark Blue
 

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Discussion Starter #7
Sorry guys. Dumb of me to leave the basic info out of it. I believe it is a 2000 Malibu LS trim(?). It's a rather basic set up. Going from after market unit to after maket unit. I replaces the oem with an after market a few years ago and the head unit recently stopped working, and that is why I am replacing again. When I mention colors, it's from the unit to the wiring harness that converts the oem wires to the after market. the big problem that I am having is the lack of continuous power to the unit from the battery to maintain power and memory. Hope this helps, and ask me if more info is needed. Sorry for being such a noob. Thanks.
 

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Here is the diagram for your model

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: Dark Green

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

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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It would be unlikely that something is wrong with the radio itself and the wires running through the car, as its probably the least complicated wiring in the whole car, ie, no computers, just power and wire, the rest is controlled through the unit itself. It is more likely how everything is hooked up.

Check your wiring and any connections you made. If you used electrical tape and twisted them together, thats probably the problem, the problem being a lack of experience and proper tools. If thats it, just keep trying, get some crimp connectors or solder and try again.

Good luck with it all, just dont give up!

Also, some systems require a Anti-theft bypass, but if you already had an aftermarket, thats most likely not the case either.
 

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mine (05 classic) using a harness that will plug into the factory end, came with a red wire not attached to any pin in the plug. that red wire will connect directly to the harness that leads INTO your aftermarket radio. the other end will need to be connected to an accessory wire found on your ignition harness (i used the brown wire in the pic below (2nd ACC.))
 

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OH AND NEVER FORGET THAT THE BEST CONNECTION IS GOING TO BE A SOLDERED CONNECTION. if your soldering skills aren't great practice practice practice. its an easy skill to learn and when mastered makes things easier when dealing with electrical wires, especially in vehicles.
 

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I added Bluetooth to my wife's factory car stereo and this is how I did it.
(These instructions will also work for installing aftermarket stereos and amps.)

1. iSimple ISFM21 App Controlled FM Transmitter

6. Go to step 2. and follow instructions in reverse order.

I hope this will help you guys out.

CMF Edit: Removed personal contacts from public post.
 

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Car Radio Battery Constant 12v+ Wire: Red/White
Car Radio Accessory Switched 12v+ Wire: Dark Green
Car Radio Ground Wire: Black/White
Car Stereo Dimmer Wire: Gray
Car Stereo Antenna Trigger Wire: Pink

Left Front Speaker Positive Wire (+): Gray
Left Front Speaker Negative Wire (-): Tan
Right Front Speaker Positive Wire (+): Dark Green
Right Front Speaker Negative Wire (-): Light Green

Left Rear Speaker Positive Wire (+): Yellow
Left Rear Speaker Negative Wire (-): Brown
Right Rear Speaker Positive Wire (+): Light Blue
Right Rear Speaker Negative Wire (-): Dark Blue

hey bro can u help me with the diagram but of a 2012 malibu ltz
 

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Car Radio Battery Constant 12v+ Wire: Red/White
Car Radio Accessory Switched 12v+ Wire: Dark Green
Car Radio Ground Wire: Black/White
Car Stereo Dimmer Wire: Gray
Car Stereo Antenna Trigger Wire: Pink

Left Front Speaker Positive Wire (+): Gray
Left Front Speaker Negative Wire (-): Tan
Right Front Speaker Positive Wire (+): Dark Green
Right Front Speaker Negative Wire (-): Light Green

Left Rear Speaker Positive Wire (+): Yellow
Left Rear Speaker Negative Wire (-): Brown
Right Rear Speaker Positive Wire (+): Light Blue
Right Rear Speaker Negative Wire (-): Dark Blue
Is that the same for a 2010 chevy Malibu lt? Thanks for the info
 

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Here is the diagram for your model

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: Dark Green

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

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
Hi im working on a 2007 malibu and i cant figure the wires out, im not getting a power output from any of the wires im trying to wire in a JVC KD SR72. ive tied in what i believe is power and then the ground as well and i dont get power to the radio. i tryed a adapter but its pin order was way off. there is also 3 dark green wires and most diagrams call for only 2. any help is appreciated thank you
 
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