INSTALLATION INSTRUCTIONS FOR PART 99-8156
APPLICATIONS
LEXUS LS SERIES
1990-1994
99-8156
KIT FEATURES
• DIN Mount Radio Provision with Pocket
• ISO Mount Radio Provision with Pocket
KIT COMPONENTS
A) Radio Housing • B) ISO Brackets • C) Radio Housing Brackets • D) Trim Plate
E) (6) #8 Phillips Screws
B
C
A
D
E
TOOLS REQUIRED:
Small Flat Blade Screwdriver/ Panel Removal Tool
• Phillips Screwdriver • Socket Set
1-800-221-0932
© COPYRIGHT 2007 METRA ELECTRONICS CORPORATION
99-8156 DASH DISASSEMBLY
LEXUS LS SERIES 1990-1994
A
1
Disconnect the negative battery ter-
minal to prevent an accidental short
circuit.
2
3
Carefully pry out and remove ashtray
assembly below radio. (Figure A)
Using a panel removal tool or small
flat blade screwdriver gently pry out
on the top of the A/C vent assembly
and remove. (Figure B)
4
5
Remove (4) screws securing the fac-
tory radio/climate control assembly.
Unplug and remove assembly.
(Figure C)
B
Remove (4) screws securing the cli-
mate controls to the assembly and
remove the climate controls from the
assembly. (Retain the screws and cli-
mate controls for re-use during kit
assembly).
Continue to kit preparation.
C
1
99-8156 KIT PREPARATION
LEXUS LS SERIES 1990-1994
DIN MOUNT RADIO PROVISION WITH POCKET
ISO MOUNT RADIO PROVISION WITH POCKET
Note: Refer also to the instructions included with the aftermarket radio.
A
1
2
Attach the corresponding radio hous-
ing bracket to the radio housing using
the included Phillips screws. (Figure A)
Slide the factory climate control into
the assembled radio housing brack-
ets/radio housing assembly and
secure with the factory hardware.
(Figure B)
Continue to kit assembly.
B
2
99-8156 KIT ASSEMBLY
LEXUS LS SERIES 1990-1994
DIN MOUNT RADIO PROVISION WITH POCKET
Note: Refer also to the instructions included with the aftermarket radio.
A
1
2
Slide the DIN cage into the Radio
Housing and secure by bending the
metal locking tabs down. (Figure A)
Slide the aftermarket radio into the
cage until it snaps in place. (Figure B)
Continue to final assembly.
B
3
99-8156 KIT ASSEMBLY
LEXUS LS SERIES 1990-1994
ISO MOUNT RADIO PROVISION WITH POCKET
Note: Refer also to the instructions included with the aftermarket radio.
A
1
Mount the ISO Brackets to the radio
using the screws supplied with the
radio. (Figure A)
2
3
Slide the radio into the radio housing
until the side clips engage. (Figure B)
Snap the Trim plate onto the front of
the Radio Housing. (Figure B)
Continue to final assembly.
B
4
99-8156 FINAL ASSEMBLY
FINAL ASSEMBLY
A
B
(A) Strip wire ends back 1/2"
B) Twist ends together
C) Solder
D) Tape
C
D
Locate the factory wiring harness in the dash. Metra recommends using the
proper mating adapter and making connections as shown. (Isolate and individ-
ually tape off the ends of any unused wires to prevent electrical short circuit.)
1
2
3
Re-connect the negative battery terminal and test the unit for proper operation.
Reassemble radio and dash assemblies in reverse order of disassembly.
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.
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
99-8156 INSTRUCTIONS
1-800-221-0932
REV. 12/05/07 © COPYRIGHT 2007 METRA ELECTRONICS CORPORATION INST99-8156
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