Metra Electronics 99-3051 User manual

INSTALLATION INSTRUCTIONS FOR PART 99-3051
Phillips Screwdriver • Rotary Cutting Tool
1-800-221-0932 www.metraonline.com
KIT FEATURES
©COPYRIGHT 2004-2009 METRA ELECTRONICS CORPORATION
•ISO mount Radio Provision with Pocket
• TwoISO Mount Unit’s Provision
•Double DIN Radio Provision
(A) Pocket • ( B) Brackets • ( C) Trim Plate • ( D) (4) #6 X 1/4” Phillips Head Screws • (E) (2) #8 X 3/8” Phillips Head Screws
KIT COMPONENTS
TOOLS REQUIRED:
99-3051
AC
D
E
APPLICATIONS
Chevrolet Corvette
1990-1996
B
WIRING AND ANTENNA CONNECTIONS (Sold Separately)
Wiring Harness:
•70-1856 - 17ft bypass harness (Non-Bose) 1989-1996
•70-1857 - 17ft bypass harness (Bose) 1989-1996
Antenna Adapter:
•Not required

Dash Disassembly
1990-1996 Chevrolet Corvette . . . . . . . . . . . . . . . . . . . . . . . . . .1, 2
Kit Assembly
ISO Mount Radio Provision with Pocket . . . . . . . . . . . . . . . . . . . 3
Double DIN Radio Provision . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Two ISO Mount Unit’sProvision . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Final Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
TABLE OF CONTENTS
99-3051
K NOWLEDGE IS P OWER
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Log onto www.installerinstitute.comor call
800-354-6782 for more informationandtake
steps towardabetter tomorrow.

99-3051
1
Disconnect the negative battery
terminal to prevent an accidental
short circuit.
1
Remove (2) screws from center AC
vent and remove vent. (Figure A)
2
1990-1996 CHEVROLET CORVETTE
Remove rubber inserts in cup hold-
ers and remove screw. (Figure B)
3
Remove (2) screws from under carpet
inside center console.
4
Set parking brake and place shifter
into the drive position.
5
Lift the center console up and slide
back. (Figure C)
6
DASH DISASSEMBLY
A
B
C
Remove (3) screws from radio/clim-
ate control trim panel and remove
panel.
(Figure C)
7
Remove (2) screws from side trim
panels to gain access to radio
screws and remove (4) screws
securing radio, unplug and remove
radio.
8

2
99-3051
DASH DISASSEMBLY
CUT OUT
D
1990-1996 CHEVROLET CORVETTE
Cut and remove obstruction from
rear of radio cavity.
(Figure D)
9

99-3051
KIT ASSEMBLY
Mount the pocket trim-plate to the
pocket using the (2) #8x3/8” Phillips
head screws provided with kit.
Larger lip towards top of pocket.
(Figure A)
1
Continue to final assembly.
4
Align the mounting holes in the
brackets with the mounting holes in
the side of the radio and mount the
brackets to the radio using screws
provided with the radio.
(Figure B)
2
Align the mounting holes in the brack-
ets belowthe radio with the mounting
holes in the pocket and mount the
pocket to the brackets using the (4)
#6x1/4” Phillips head screws provided
with the kit.
(Figure C)
3
ISO MOUNT RADIO WITH POCKET
A
B
C
3
1990-1996 CHEVROLET CORVETTE

4
99-3051
KIT ASSEMBLY
Align the mounting holes in the left
bracket with the mounting holes in
the left side of the radio and mount
the bracket to the radio using
screws provided with the radio.
(Figure A)
1
Align the mounting holes in the left
bracket with the mounting holes in the
left side of both units and mount the
bracket to both units using screws
provided with the units.
(Figure A)
1
Continue to final assembly.
3
Repeat step one with the right
bracket on the right side of the radio.
2
Continue to final assembly.
3
Repeat step one with the right bracket
on the right side of the units.
2
DOUBLE DIN RADIO PROVISION
TWOISO MOUNT UNITS
A
A
1990-1996 CHEVROLET CORVETTE

5
FINAL ASSEMBLY
1
Locate the factory wiring harness in the dash and make the connection as shown.
Metra recomends using the proper mating adapter and making the connections as
shown. (Isolate and individually tape off the ends of any unused wires to prevent
electrical short circuit.)
2
Re-connect the negative battery terminal and test the unit for proper operation.
3
Reassemble radio and dash assemblies in reverse order of disassembly.
A
A) Strip wire ends back 1/2"
B) Twist ends together
C) Solder
D) Tape
B
C
D
Make wiring connections 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.
12V Ignition / Acc . . . Red
12V Batt / Memory . . Yellow
Ground . . . . . . . . . . . Black*
Power Antenna . . . . . Blue
Amp Turn-On . . . . . . Blue / White
Amp Ground . . . . . . . Black / White
Illumination. . . . . . . . Orange
Dimmer . . . . . . . . . . Orange / White
Right Front (+) . . . . . Gray
Right Front (-). . . . . . Gray / Black
Left Front (+) . . . . . . White
Left Front (-) . . . . . . . White / Black
Right Rear (+). . . . . . Violet
Right Rear (-) . . . . . . Violet / Black
Left Rear (+). . . . . . . Green
Left Rear (-) . . . . . . . Green / Black
*NOTE: When a Black wire is not present, ground radio to vehicle chassis.
All colors may not be present on all leads due to manufacturer’s specifications.
METRA / EIA WIRING CODE
FINAL WIRING CONNECTIONS
99-3051
FINAL ASSEMBLY

INST993051
1-800-221-0932 www.metraonline.com
REV.06/05/09 © COPYRIGHT 2004-2009 METRA ELECTRONICS CORPORATION INST99-3051