Metra Electronics Automobile Accessories 99 3051 User Manual

INSTALLATION INSTRUCTIONS FOR PART 99-3051  
APPLICATIONS  
Chevrolet Corvette  
1990-1996  
99-3051  
KIT FEATURES  
• ISO mount Radio Provision with Pocket  
• Two ISO Mount Unit’s Provision  
• Double DIN Radio Provision  
KIT COMPONENTS  
( 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  
D
A
B
C
WIRING AND ANTENNA CONNECTIONS (Sold Separately)  
E
Wiring Harness:  
• 70-1856 - 17ft bypass harness (Non-Bose) 1989-1996  
• 70-1857 - 17ft bypass harness (Bose) 1989-1996  
Antenna Adapter:  
• Not required  
TOOLS REQUIRED:  
Phillips Screwdriver • Rotary Cutting Tool  
1-800-221-0932  
© COPYRIGHT 2004-2009 METRA ELECTRONICS CORPORATION  
 
DASH DISASSEMBLY  
99-3051  
1990-1996 CHEVROLET CORVETTE  
A
Disconnect the negative battery  
1
terminal to prevent an accidental  
short circuit.  
2
3
4
Remove (2) screws from center AC  
vent and remove vent. (Figure A)  
Remove rubber inserts in cup hold-  
ers and remove screw. (Figure B)  
Remove (2) screws from under carpet  
inside center console.  
B
Set parking brake and place shifter  
into the drive position.  
5
6
7
Lift the center console up and slide  
back. (Figure C)  
Remove (3) screws from radio/clim-  
ate control trim panel and remove  
panel. (Figure C)  
C
Remove (2) screws from side trim  
panels to gain access to radio  
screws and remove (4) screws  
securing radio, unplug and remove  
radio.  
8
1
 
DASH DISASSEMBLY  
99-3051  
1990-1996 CHEVROLET CORVETTE  
Cut and remove obstruction from  
9
rear of radio cavity. (Figure D)  
D
CUT OUT  
2
 
KIT ASSEMBLY  
99-3051  
1990-1996 CHEVROLET CORVETTE  
ISO MOUNT RADIO WITH POCKET  
A
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
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  
2
3
B
provided with the radio. (Figure B)  
Align the mounting holes in the brack-  
ets below the 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)  
Continue to final assembly.  
4
C
3
 
KIT ASSEMBLY  
99-3051  
1990-1996 CHEVROLET CORVETTE  
DOUBLE DIN RADIO PROVISION  
A
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
Repeat step one with the right  
2
bracket on the right side of the radio.  
Continue to final assembly.  
3
TWO ISO MOUNT UNITS  
A
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
Repeat step one with the right bracket  
on the right side of the units.  
2
3
Continue to final assembly.  
4
 
FINAL ASSEMBLY  
99-3051  
FINAL ASSEMBLY  
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.)  
1
Re-connect the negative battery terminal and test the unit for proper operation.  
Reassemble radio and dash assemblies in reverse order of disassembly.  
2
3
FINAL WIRING CONNECTIONS  
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.  
A
A)  
B)  
C)  
D)  
Strip wire ends back 1/2"  
Twist ends together  
Solder  
B
C
D
Tape  
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 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.  
5
 
INST993051  
1-800-221-0932  
REV. 06/05/09  
© COPYRIGHT 2004-2009 METRA ELECTRONICS CORPORATION  
INST99-3051  
 

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