I've got a 1999 ford expedition with the Mach radio system in it and it does not have any bass playing thru the front or back speakers and i've changed out the factory amp thats in the back where the sub is. The treble works fine and the speakers sound good just no bass what-so-ever THANKS!!!!!!!!!

Question edited for clarity and bad spelling of 'Expedition'.
Question moved to model category.
Quit typing in all CAPS, it is considered SHOUTING and RUDE. It is also harder to read!

This seldom works, and the reason is because the radio system and steering wheel controls are monitored and operated by the Body Control Module on the 5 volt Can Bus System. When you connect your new Android box, the computer won't have a clue what is going on! Be prepared for a whole heap of trouble.

2007-10 Ford Expedition AE Page 1

Scosche https://www.scosche.com > media > guides
Brown/Blue. Below Radio Behind. Speaker Amplifier: Radio Bezel. Page 2. VEHICLE DISASSEMBLY. REAR DOOR SPEAKER. RADIO REMOVAL. FRONT DOOR TWEETER. FRONT DOOR ...
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2007 expedition, stereo wiring - the12volt.com

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Question edited for clarity and mis-spelling of model name.
Question moved to model category.

1999 Ford Expedition Car Stereo Wire Colors and Locations

https://www.the12volt.com > installbay > stereo detail
1999 Ford Expedition Stereo Wiring ; Right Front (-), White/Orange ; Rear Speakers, 6" x 8" Rear Doors ; Left Rear (+), Light Blue/Black ; Left Rear (-), Yellow.

1999 Ford Expedition Car Audio Wiring Diagram

https://www.modifiedlife.com > 1999-ford-expedition-c...
Mar 2, 2011 - Our 1999 Ford Expedition radio wiring diagram shows you all the radio wire colors and what they do. Table of Contents. 1999 Ford Expedition ...

Does your car have the Mach system, if so the amp has went out or the connection for the amp in the back of the radio is defective. I have a 2001 Expedition with the Mach system, and this is a major problem with these system's. I've replaced the amp, but it didn't work, so I was told to check the connector in the back of radio, sometimes those come disconnected, but that wasn't it either. And now I know the connection on the back is bad. Are all of the speaker not working or just the bass sub/subs

2002 Ford Expedition Car Radio Wiring Guide
Car Radio Battery Constant 12v+ Wire: White/Violet
Car Radio Accessory Switched 12v+ Wire: Black/Pink
Car Radio Ground Wire: Black/Green
Car Radio Illumination Wire: Blue/Black
Car Stereo Dimmer Wire: N/A
Car Stereo Antenna Trigger Wire: 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 (+): White/Red
Left Front Speaker Negative Wire (-): Brown
Right Front Speaker Positive Wire (+): Green
Right Front Speaker Negative Wire (-): White/Orange
Car Audio Rear Speakers Size: N/A
Car Audio Rear Speakers Location: N/A
Left Rear Speaker Positive Wire (+): Light Blue/Black
Left Rear Speaker Negative Wire (-): Yellow
Right Rear Speaker Positive Wire (+): Violet/White
Right Rear Speaker Negative Wire (-): Light Blue

pls rate

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

Ford usually fitted elliptical speakers in their models in the 1990's so it's possible that yours are 6"x9" or something similar.
You can get replacements from Ford, (which are usually very expensive!) or buy some better ones on the Internet, such as Ebay or Amazon.
I bought a pair of German Blaupunkt 6x9's for my car from some site I found on Ebay and the price was around half of that to buy the *same* speakers from Ford Spare parts Dep't!!!
The sound is fantastic!

PS: You should be able to access the rear speakers below the rear parcel shelf at each side of your Expedition. They are held in place by 4 screws, which usually have a Posidriv (+) type screwdriver head.
When refitting, make sure!!! that you fix the +ve spade terminal to the +ve marked on your new speaker & the -ve terminal to the -ve. Do this on both speakers to make sure that they are both in-phase (so both bass drive units are pushing air forwards together). If you don't keep them in phase, the speakers will produce much less bass - which is clearly noticable!

Hope this helps

1997 Ford Expedition Car Radio Wiring Diagram
Car Radio Battery Constant 12v+ Wire: White/Purple
Car Radio Accessory Switched 12v+ Wire: Black/Pink
Car Radio Ground Wire: Black/Green
Car Radio Illumination Wire: Blue/Black
Car Stereo Dimmer Wire: N/A
Car Stereo Antenna Trigger Wire: N/A
Car Stereo Amp Trigger Wire: Blue
Car Stereo Amplifier Location: N/A
Car Audio Front Speakers Size: 6′ x 8′
Car Audio Front Speakers Location: Doors
Left Front Speaker Positive Wire (+): White/Red
Left Front Speaker Negative Wire (-): Brown
Right Front Speaker Positive Wire (+): Green
Right Front Speaker Negative Wire (-): White/Orange
Car Audio Rear Speakers Size: 6′ x 8′
Car Audio Rear Speakers Location: Rear Doors
Left Rear Speaker Positive Wire (+): Light Blue/Black
Left Rear Speaker Negative Wire (-): Yellow
Right Rear Speaker Positive Wire (+): Purple/White
Right Rear Speaker Negative Wire (-): Light Blue

pls rate

use google. i did and i got this
Car Radio Battery Constant 12v+ Wire: Light Green
Car Radio Accessory Switched 12v+ Wire: Yellow/Black
Car Radio Ground Wire: Black
Car Radio Illumination Wire: Light Blue/Red
Car Stereo Dimmer Wire: N/A
Car Stereo Antenna Trigger Wire: N/A
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: If equipped, the factory amplifier is located behind the trim panel on the right side of the cargo area.
Car Audio Front Speakers Size: N/A
Car Audio 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 (+): Dark Green/Orange
Right Front Speaker Negative Wire (-): White/Light Green
Car Audio Rear Speakers Size: N/A
Car Audio 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

1997 Ford Expedition Car Radio Wiring Diagram
Car Radio Battery Constant 12v+ Wire: White/Purple
Car Radio Accessory Switched 12v+ Wire: Black/Pink
Car Radio Ground Wire: Black/Green
Car Radio Illumination Wire: Blue/Black
Car Stereo Dimmer Wire: N/A
Car Stereo Antenna Trigger Wire: N/A
Car Stereo Amp Trigger Wire: Blue
Car Stereo Amplifier Location: N/A
Car Audio Front Speakers Size: 6′ x 8′
Car Audio Front Speakers Location: Doors
Left Front Speaker Positive Wire (+): White/Red
Left Front Speaker Negative Wire (-): Brown
Right Front Speaker Positive Wire (+): Green
Right Front Speaker Negative Wire (-): White/Orange
Car Audio Rear Speakers Size: 6′ x 8′
Car Audio Rear Speakers Location: Rear Doors
Left Rear Speaker Positive Wire (+): Light Blue/Black
Left Rear Speaker Negative Wire (-): Yellow
Right Rear Speaker Positive Wire (+): Purple/White
Right Rear Speaker Negative Wire (-): Light Blue
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