Where dose purple wire behind radio hook to I'm 2000 chevy impala

https://www.modifiedlife.com/2004-chevrolet-impala-car-radio-wire-guide/

Here is a free wire diagram color coded for a 2000 Chevy Impala LS:
Battery Constant 12v+ Positive Wire (Yellow): The constant 12V+ wire is yellow.
Starter Positive Wire (Purple): The starter wire is purple.
Ignition Positive Wire (Red): The ignition wire is red.
Second Ignition Positive Wire (Pink/White): The second ignition wire is pink/white.
Accessory Positive Wire (Orange): The accessory wire is orange.
Power Antenna Turn On (Blue): The power antenna wire is blue.
Amplifier Turn On (Blue/White): The amplifier wire is blue/white.
Left Front Speaker Positive Wire (+): The left front speaker wire is tan.
Left Front Speaker Negative Wire (-): The left front speaker wire is gray.
Right Front Speaker Positive Wire (+): The right front speaker wire is light green.
Right Front Speaker Negative Wire (-): The right front speaker wire is dark green.
Left Rear Speaker Positive Wire (+): The left rear speaker wire is brown.
Left Rear Speaker Negative Wire (-): The left rear speaker wire is yellow.
Right Rear Speaker Positive Wire (+): The right rear speaker wire is dark blue.
Right Rear Speaker Negative Wire (-): The right rear speaker wire is light blue.

https://www.youtube.com/watch?v=irSi9roauwI

This video has a lot of Impala wiring information and also has links so that you can download the diagrams.

You can't use High Beams as dipped, the spread is different. Just go to another garage, it can only be the bulbs, the connection, the fuses or the relay. In fact you can check all those yourself! It appears to be a known issue on the Impala. Look at the videos

https://www.google.com/search?q=2000+chevy+impala+headlight+problem

Fuse Box Diagram Chevrolet Impala (2000-2005)

https://fuse-box.info > chevrolet > chevrolet-impala-20...
It is located on the passenger's side of the instrument panel, behind the cover. The location of the fuses in the passenger compartment: Chevrolet Impala (2000- ...

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you are going to have make and model ## of the car stereo, if GM
still go to have model ## off the back of stereo and what would be better is a part number would be very good.

www.freeproductmanual.com
www.infolink.com
www.wikipedia.org
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schematics

www.eserviceinfo.com/equipment_type/schematics
www.free-schematic.blog.spot.com/
www.electronicshelponline.com/radio_wire_diagrams

other sites for help

www.manualsonline.com/radio_wiring_diagram
www.wikipedia.org/wiring diagram radio
www.alltheinternet.com/radio_wiring_diagrams

You need to know how to use a volt/ ohm meter. If you don't . have some one to replace the radio. If you put 12 volts to the wring wire, you cold blow the PCM. Or other computers.

2000 Chevrolet Impala Car Stereo Radio Wiring Diagram
Car Radio Constant 12v+ Wire: Orange
Car Radio Switched 12v+ Wire: Yellow
Car Radio Ground Wire: Black
Car Radio Illumination Wire: Gray
Car Stereo Antenna Trigger: White
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

All you need to do is get the power, ground, and antenna hooked up then start with two colors matching, example: one purple and one black with purple line hook those up to a matching speaker wire then turn stereo on and go to balance setting choose back left if speaker does not sound then go back right and if speaker does not sound then try front speaker right and then left once you find correct speaker move on to next two matching remember to. Mark wires FL or fr or bl or back right. Good luck

I switched my stock radio out of my 2001 Chevy Impala because it was defective and replaced it with a used radio I got from the junkyard. I called Chevy to see if I could get the code to unlock it and they told me I had to go to a Chevy dealership which I did. Cost $40.