INSTALLATION INSTRUCTIONS FOR PART 99-7503
APPLICATIONS
2003-2005 Mazda 6
99-7503
KIT FEATURES
• DIN Head Unit Provision
• ISO DIN Head Unit Provision
KIT COMPONENTS
A) Radio/Climate Control Housing Assembly l B) ISO Brackets l C) ISO Trim plate l D) Harnesses
A
B
D
C
TOOLS REQUIRED:
Phillips Screwdriver I Small Flat Blade Screwdriver I Socket Wrench
1-800-221-0932
© COPYRIGHT 2004 METRA ELECTRONICS CORPORATION
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DASH DISASSEMBLY
99-7503
2003-2004 MAZDA 6
Electronic Climate Control
A
Disconnect the negative battery
1
terminal to prevent an accidental
short circuit.
2
3
Unscrew the shift knob counter
clockwise to remove. (Figure A)
Unclip and remove the cup
holder/parking brake cover and
shifter cover as one unit. (Figure B)
B
Remove (2) Phillips screws from the
bottom of the radio/climate control
panel. (Figure C)
4
5
Open glove box, squeeze sides
together and let open fully then
remove (1) 10 MM bolt from the side
of the radio bracket. (Figure D)
C
D
INSIDE
GLOVE BOX
1
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DASH DISASSEMBLY
99-7503
2003-2004 MAZDA 6
Electronic Climate Control
E
6
7
8
Unsnap and remove radio/climate
control panel including climate con-
trol vents at the top. (Figure E)
Remove (4) Phillips screws securing
vents to radio/climate control panel
to remove. (Figure F)
Remove (8) Phillips screws securing
the electronic climate control to the
radio/climate control panel to
remove. (Figure G)
F
Remove (4) Phillips screws securing
the radio display harness bracket to
the radio chassis then unclip and
remove the radio display harness.
(Figure H)
9
G
H
Rear of Radio/Climate Control Panel
Rear of Electronic Climate Control
2
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DASH DISASSEMBLY
99-7503
2003-2004 MAZDA 6
Manual Climate Control
A
Disconnect the negative battery
1
terminal to prevent an accidental
short circuit.
Unscrew the shift knob counter
clockwise to remove. (Figure A)
2
3
Unclip and remove the cup
holder/parking brake cover and
shifter cover as one unit. (Figure B)
B
Remove (2) Phillips screws from the
bottom of the radio/climate control
panel. (Figure C)
4
5
Pull the climate control knobs off
and remove (2) Phillips screws from
behind knobs. (Figure D)
D
C
A/C
3
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DASH DISASSEMBLY
99-7503
2003-2004 MAZDA 6
Manual Climate Control
E
Open glove box, squeeze sides
6
together and let open fully then
remove (1) 10 MM bolt from the side
of the radio bracket. (Figure E)
Unsnap and remove radio/climate
control panel including climate con-
trol vents at the top. (Figure F)
7
8
INSIDE
GLOVE BOX
Remove (4) Phillips screws securing
vents to radio/climate control panel
to remove. (Figure G)
F
Remove the (2) small Phillips screws
securing the light bulb boards on
each side of the backlight dispersion
bar. Note: Notice how they are posi-
tioned in the backlight dispersion bar
as they will be placed in the 99-7503
the same way. (Figure H)
9
H
G
4
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DASH DISASSEMBLY
99-7503
2003-2004 MAZDA 6
Manual Climate Control
I
Remove (4) Phillips screws securing
backlight dispersion bar and knob
trim bezels. (Figure I)
10
11
Push the bottom edges of the knob
trim bezels from the front side to the
back and slide both pieces out as
one unit. (Figure J)
Remove (4) Phillips screws securing
the radio display harness bracket to
the radio chassis then unclip and
remove the radio display harness.
(Figure K)
12
J
K
5
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KIT ASSEMBLY
99-7503
2003-2004 MAZDA 6
Electronic Climate Control
A
1
2
Clip the climate control knob outer
trim ring panel into the 99-7503
housing. (Figure A)
Align the screw holes in the climate
control and the radio housing panel
then push the climate control onto
the radio housing panel. (Figure B)
3
3
Secure the climate control with the
factory hardware removed in step 8
of the dash disassembly for
B
electronic climate control cars.
Unclip and remove the small oval
cover plate at the bottom center of
the factory radio and insert into the
99-7503 radio housing. (Figure C)
REAR
VIEW O
F ELEC
TRONI
C CLIM
ATE C
ONTRO
L
Note: The 16 position to 16 position
harness supplied with the 99-7503
will NOT be used in vehicles with
electronic climate controls. (Figure D)
D
C
6
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KIT ASSEMBLY
99-7503
2003-2004 MAZDA 6
Manual Climate Control
Put the climate control knob outer
A
1
trim panel and the backlight disper-
sion bar together and clip into the
radio housing panel as one unit.
Note: You may have to push down
slightly on the middle of the unit to
ease in positioning it into the kit.
(Figure A, B, C )
Secure the unit with the factory
hardware removed in step 10 of the
manual climate control dash disas-
sembly.
2
3
B
Secure the light bulb boards on each
side of the backlight dispersion bar
using the factory hardware removed
in step 9 in manual climate control
dash disassembly. (Figure D )
ASSEMBLED
Unclip and remove the small oval
cover plate at the bottom center of
the factory radio and insert into the
99-7503 radio housing. (Figure E)
4
C
D
INSTALLED
F
Note: The 16 position to
16 position harness sup-
plied with the 99-7503
WILL be used in vehicles
with manual climate
E
controls. (Figure F)
7
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KIT ASSEMBLY
99-7503
DIN HEAD UNIT PROVISION
A
Slide the DIN cage into the Radio
Housing and secure by bending the
metal locking tabs down. (Figure A)
1
2
3
Slide the aftermarket head unit into
the DIN cage until secure. (Figure B)
B
Snap the Trim plate into the Radio
Housing.(Figure B)
ISO DIN HEAD UNIT PROVISION
A
Mount the ISO Brackets to the head
1
unit with the screws supplied with
the unit. (Figure A)
Slide the head unit into the radio
opening until the side clips engage.
(Figure B)
2
3
B
Snap the Trim plate into the Radio
Housing.(Figure B)
8
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99-7503
FELT TAPE APPLICATION
Apply To
Rear Of
Both Sides
Note: Due to differences in factory tolerances you may need to apply the provided felt tape to the
edge of the 99-7503 radio housing to relieve backlight bleed through.
1. Looking at edge of radio housing apply felt tape to inner edge (toward back of kit). If it is posi-
tioned to closely to the outer edge you may be able to see it once it is in the dash.
9
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99-7503
DISPLAY CUSTOMIZATION
1. Press and hold the Clock button in the factory display until “Set Text” is displayed, then release
the button. Settings will begin with the first character location. Use the Set button to select the
desired character then press the AMB button to select the next character location. There are 10
available character locations.
2. Once the desired text is entered if you do not touch any buttons for 10 seconds the display will
read “Saved Text” and your text will be saved.
3. To set the clock press and hold the Clock button until “Hr. Adjust” is displayed then use the Set
button to select the desired hour.
4. Press the Clock button again and the display will read “Min. Adjust” then use the Set button to
select the desired minutes.
Note: If equipped with a Dimmer button it will still function as normal.
10
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FINAL ASSEMBLY
99-7503
FINAL WIRING and ASSEMBLY
A) Strip wire ends back 1/2"
A
B) Twist ends together
B
C) Solder
C
D) Tape
D
1
Locate the factory wiring harness in the dash. Use the supplied wire harnesses
and make the connection as shown. (Isolate and individually tape off the ends
of any unused wires to prevent electrical short circuit.)
Make wiring conections using the EIA color code chart shown below and the instructions included with the
head unit. Metra recommends making connections as shown below; Strip, Splice, Solder, Tape. Isolate and
individually tape off ends of any unused wires to prevent electrical short circuit.
METRA / EIA WIRING CODE
12V Ignition / Acc . . Red
Right Front (+). . . . . Gray
12V Batt / Memory . Yellow
Ground. . . . . . . . . . . Black*
Power Antenna . . . . Blue
Right Front (-) . . . . . Gray / Black
Left Front (+) . . . . . . White
Left Front (-) . . . . . . White / Black
Right Rear (+) . . . . . Violet
Amp Turn-On . . . . . . Blue / White
Amp Ground. . . . . . . Black / White
Illumination . . . . . . . Orange
Dimmer . . . . . . . . . . Orange / White
Right Rear (-). . . . . . Violet / Black
Left Rear (+) . . . . . . Green
Left Rear (-) . . . . . . . Green / Black
*NOTE: When Black a wire is not present, ground radio to vehicle chassis.
All colors may not be present on all leads due to manufacturer’s specifications.
Plug the 5 way connector (supplied with the 99-7503) into location 1 on the back of the
99-7503 housing (see diagram).
2
Plug the 16 way connector that you removed from the factory radio into location 2 on the back
of the 99-7503 housing (see diagram).
3
4
On manual climate control vehicles only, plug the 16 way connector (supplied with the
99-7503) into location 3 on the back of the 99-7503 housing
(see diagram). Automatic climate control vehicles will not use this harness.
5
6
Re-connect the negative battery
terminal and test the unit for
proper operation.
1
3
Reassemble radio and dash
assemblies in reverse order of
disassembly.
2
11
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99-7503
NOTES
12
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99-7503
NOTES
13
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INST997503
1-800-221-0932
REV. 09/09/05
© COPYRIGHT 2004 METRA ELECTRONICS CORPORATION
INST99-7503
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