Front left speaker on car quit working

Try another loudspeaker across a rear speaker to check if it is a wiring issue first.
Is the fader control set correctly I wonder.

The wires provided for a radio system are as follows:
yellow = hot with ignition key ON
orange = hot from BATT at all times
Grey = dimming power from instrument panel

Black = ground

Harness Wires provided for the speakers as follows:
Left rear speaker = +brown -yellow
Right rear speaker = +dark blue - light blue
Left front door speaker and tweeter = +tan - grey
Right front door speaker and tweeter = +light green -grey
Note: connection colors at the speaker location differ as noted:
Right front door = +brown -yellow
Left front door = +brown -yellow
All other speaker connections are consistent with their harness colors.

Car Radio Battery Constant 12v+ Wire: Red/Black
Car Radio Accessory Switched 12v+ Wire: Blue
Car Radio Ground Wire: N/A
Car Radio Illumination Wire: Red/Yellow
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 Location: Doors
Left Front Speaker Positive Wire (+): Blue/White
Left Front Speaker Negative Wire (-): Blue/Yellow
Front Speaker Positive Wire (+): Brown
Front Speaker Negative Wire (-): Brown/White
Car Audio Rear Speakers Location: Side Panels
Left Rear Speaker Positive Wire (+): Red
Left Rear Speaker Negative Wire (-): Green
Right Rear Speaker Positive Wire (+): Blue
Right Rear Speaker Negative Wire (-): Pink

Windstar Car Stereo Radio Wiring Diagram - All years
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: Green
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
Left Rear Speaker Positive Wire (+): Light Brown/White Left Rear Speaker Negative Wire (-): Light Brown/Yellow Right Rear Speaker Positive Wire (+): Light Brown/Green Right Rear Speaker Negative Wire (-): Brown/Pink

Speakers
1995-1998: 5" x 7" Front door and side panel 1999-2003: 6" x 8" Front and rear door

radio may have been wired improperly or fuse may have blown. First check fuses. Below is the color scheme for your radio wiring. The dimmer wire is White with a green stripe. This wire should be connected to the orange wire of your aftermarket stereo. If you have an unusual stereo, leave the factory wire unhooked (and insulated) until you can verify which wire on your stereo is for the light. Let me knoiw if you have questions.

Radio Constant 12V+ Wire: Blue/Yellow
Radio Switched 12V+ Wire: Gray
Radio Ground Wire: Brown
Radio Illumination Wire: Dark Green
Dimmer Wire: White/Green
Antenna Trigger Wire: None
Front Speaker Size: 6 1/2?
Front Speaker Location: Doors
Left Front Speaker Wire (+): Pink
Left Front Speaker Wire (-): Purple
Right Front Speaker Wire (+): Green
Right Front Speaker Wire (-): Blue
Rear Speaker Size: 6? x 9?
Rear Speaker Location: Rear Deck
Left Rear Speaker Wire (+): Black
Left Rear Speaker Wire (-): Yellow
Right Rear Speaker Wire (+): Red
Right Rear Speaker Wire (-): White

pls. be more specific in describing the problem/ door panel means the complete door/ u mean u took off the whole door to install speakers? or just the door trimboard?

check wires in the door hinge area should be in a black boot. Check balance setting on radio making sure it's not adjusted to left side and right

Check your connections again. Check that they're connected correctly. Look at a diagram, check the fuse on the power (red) wire from the radio. The radio might have fuses on the back of it, check them too. If anything put and tape every thing back together and use a harness then go from there.

Constant 12V+ Brown/White
Switched 12V+ Orange
Ground Black/Light Green
Illumination Pink/Black
Dimmer Pink
Front Speakers 5" x 7" Doors
Left Front (+) Gray/Blue
Left Front (-) Yellow/Blue
Right Front (+) Blue
Right Front (-) Yellow
Rear Speakers 5" x 7" Side Panels

Left Rear (+) Blue/White
Left Rear (-) Blue/White
Right Rear (+) Blue/Black
Right Rear (-) Red/Blue

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FYI - I just took our 2004 Sequoia in because of speaker rattle coming from the front door speakers. Before I could tell them the problem, they guessed what it was. They see loads of Sequoias and Tundras with JBL systems due to the front door 8in speaker, basically, coming apart. His suggestion was to replace only the bottom 8in speaker, because the top tweeters usually are in good working condition. There is a minimal failure rate on the tweeters.