I have a short somewhere in my left front door that shorts out the fm & cd player in my 2002 ford focus how do test wires that are bad

These are the three top websites. According to Just Answer it came with AM/FM Radio, AM/FM Radio Cassette, and two types of AM/FM Cassette / CD Changer. All 4 are shown in the link

https://www.justanswer.com/ford/0hkix-find-1999-ford-taurus-stereo-wiring-harness-diagram.html

These are the other two websites.

1999 Ford Taurus Car Stereo Wire Colors and Locations

The12Volt https://www.the12volt.com > installbay > stereodetail
1999 Ford Taurus Stereo Wiring ; Ground, Black/Light Green ; Illumination, Light Blue/Red ; Dimmer, n/a ; Antenna, Left Rear ; Front Speakers, 5" x 7" Doors.

1999 Ford Taurus Radio Wiring Diagram

MODIFIEDLIFE https://www.modifiedlife.com > 1999-ford-taurus-radi...
Our 1999 Ford Taurus radio wiring diagram shows you all the radio wire colors and what they do. Table of Contents. 1999 Ford Taurus Radio Wiring Diagram; 1999 ...

.. Here is the AM/FM Radio wiring

Someone has probably wired into the system for speakers, amps or something electronics and there is an electrical short (or ground) somewhere that is causing it. Trace all non factory wires and make sure they are not touching metal (grounding) anywhere.

The humming sound prior to cutting out could indicate a short in the unit itself.....remove unit and have it tested!

the clicking is a circut breaker your radio has a short somewhere

2002 Ford Mustang Car Stereo Radio Wiring Diagram
Radio Constant 12V+ Wire: Purple/Light Blue
Radio Switched 12V+ Wire: Black/Pink
Radio Ground Wire: Black/Light Green, Black
Radio Illumination Dimmer Wire: Light Blue/Red
Radio Antenna Trigger Wire: Orange/Light Blue
Front Speakers Size: N/A
Front Speakers Location: N/A
Left Front Speaker Wire (+): Orange/Light Green
Left Front Speaker Wire (-): Light Blue/White
Right Front Speaker Wire (+): White/Light Green
Right Front Speaker Wire (-): Green/Orange
Rear Speakers Size: N/A
Rear Speakers Location: N/A
Left Rear Speaker Wire (+): Gray/Light Blue
Left Rear Speaker Wire (-): Tan/Yellow
Right Rear Speaker Wire (+): Orange/Red
Right Rear Speaker Wire (-): Brown/Pink

HERE U GO.

2002 Pontiac Grand Am Car Audio Wiring Diagram
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: Gray
Car Stereo Dimmer Wire: Brown
Car Stereo Antenna Trigger Wire: N/A
Car Stereo Amp Trigger Wire: Pink
Car Stereo Amplifier Location: Mounted behind trim in the left side of the trunk.
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
-->

Pin --- Color --- Stripe --- Function

Harness 1

1 --- White --- Black --- Left front +
2 --- Gray --- Black --- Left front -
3 --- White --- Purple --- Left rear +
4 --- Gray --- White --- Left rear -
5 --- White --- Red --- Right front +
6 --- Gray --- Red --- Right front -
7 --- White --- (none) --- Right rear +
8 --- Gray --- (none) --- Right rear -

Harness 2

1 --- (not used)
2 --- Black --- Green --- Radio Ground
3 --- (not used)
4 --- Orange (thin) --- Black --- Radio Illumination
5 --- Green --- Yellow --- Radio switch
6 --- Black --- Yellow --- Radio Ground
7 --- Orange (thick) --- Black --- Radio 12V

Harness 3

1 --- White --- Green --- Speed sensor
2 --- (not used)
3 --- (not used)
4 --- (not used)
5 --- (not used)
6 --- (not used)

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
-->

HERE YOU GO ALL WIRES U NEED PLEASE RATE ME GOOD LUCK WILL WORK GOOD!!!!!!!!


2003 Ford Focus Car Stereo Radio Wiring Diagram
Radio Constant 12V+ Wire: Orange/Black (Thick Wire)
Radio Switched 12V+ Wire: Yellow/Green
Radio Ground Wire: Black/Yellow and Black/Green
Radio Illumination Wire: Orange/Black (Thin Wire)
Radio Dimmer Wire: N/A
Radio Antenna Trigger Wire: N/A
Radio Amp Trigger Wire: None
Front Speakers Size: N/A
Front Speakers Location: N/A
Left Front Speaker Wire (+): White/Black
Left Front Speaker Wire (-): Gray/Black
Right Front Speaker Wire (+): White/Red
Right Front Speaker Wire (-): Gray/Red
Rear Speakers Size: N/A
Rear Speakers Location: N/A
Left Rear Speaker Wire (+): White/Purple
Left Rear Speaker Wire (-): Gray/White
Right Rear Speaker Wire (+): White
Right Rear Speaker Wire (-): Gray
-->

i supose the am fm radio just dosnt cut it anymore well lets give this a try . first u must disconnect positive battery cable so you dont short any wires . remove screws that hold in factory radio pull radio out a feww inches as no to rip out any wires.next you must locate positive 12 volt power supply wire usually red or orange .if not shure connect battry cable again and use a 12 volt test light by attaching the ground cable on the test light to a good clean metal bracket under dashboard or connect to a black groundwire with a screw into the steel under dash next probe the wires goin into the factory radio ur looking to find power 12 volts once you have found the correct power wire use tape and mark it this will be the power wire for your new stereo next u must figure out what wires for what speakers osually 2 wires per speaker 2 rear speakers and 2 front speakers meaning a total of 8 wires follw me so far ? now disconect car battry again so not to have sparks and cut or disconnect remaining wires speakers first label all with tape and mark front right front left rear left rear right there is a + and - the wire with the stripe on it is usually the + the other wire is the - being negitive ground . this operation is important in order for your fade ballance controlls to work properly now with your new cd player inhand look and see what wire is gonna be 12 volt most times its red with a fuse eg white plastic connector small fuse inside there it a must proper fuse to protect new cd player now there will be a black negative this will go to the matal ground area under dash close to where cd player goes into dash red to the orig taped 12 volt supply now ur spks one pos+ and one neg or common to each speaker now make all conections with stereo before you push stereo into dash you must hook up car battry leaving cd player hanging out so you can make wire changes if you wish on the speakers you need to use one pos front right or rear right + with one common or neg black - to the spkr the same common or ground or - whatever its called one common or neg can be used for all spkrs .good luck tape and solder all connections after you feel all is good im sorry this is all the help i can offer you be careful