White - Left Front Speaker Positive
Violet/Black - Right Rear Speaker Negative
Red - 12 Volts Switched Power
Violet - Right Rear Speaker Positive
Green - Left Rear Speaker Positive
Yellow - 12 Volts Constant Power
Gray - Right Front Speaker Positive
Gray/Black - Right Front Speaker Negative
Green/Black - Left Rear Speaker Negative
White/Black - Left Front Speaker Negative
Black - Chassis Ground (connect with Black wire of new receiver)
*Blue - Power Antenna or Amplifier Turn-On
120 70-1858
Revision 04/08/15
STEP 1 -- CONNECT WIRES
*120701858*
IMPORTANT
Before starting, compare items on your invoice with items
received. Thoroughly check packing materials. If an item
is missing, please call Crutchfield at 1-888-955-6000.
Note: The Red and Yellow wires are reversed in 85-87 Somersets
and 86-89 Skylarks factory equipped with digital AM radios.
If your receiver does not have an illumination
wire, tape off the Orange wire.
Individually tape off any unused wires.
Receiver Wiring Adaptor
Orange - Illumination
Copyright 2015 Crutchfield Corporation
*If the vehicle was equipped with factory OnStar, the Remote Wire
will be in Pin #29 on the separate 9-Pin plug (Pink Wire). The Amp
Remote Wire from the receiver must be spliced to this Pink Wire.
A. Match wires below to the matching function of each wire on your receiver (refer to instructions supplied with receiver). The wire colors of your
new receiver may, or may not, match the wire colors of the adaptor. Match adaptor and receiver wires by function, disregarding color.
Your receiver illumination wire could be Orange or Orange/White. As with other wires, match this wire to the illumination wire in this harness
by function, not by color. If your receiver does not have an illumination wire, tape off the illumination wire.
Individually tape off any unused wires.
Make final wiring connections following instructions on the next page.
B.
C.
D.
Receiver Wiring Adaptor Connections
120 70-1858
Page 2
STEP 2 -- CONTINUED
A. Strip wires back 1/2”.
B. Twist wires together and
insert in crimp cap.
C. Squeeze middle of cap
for tight connection.
Copyright 2015 Crutchfield Corporation
STEP 3 -- APPLICATION
When ready to install the receiver, plug
the Wiring Adaptor from the new receiver
or receiver assembly into the factory
radio harness(es) in the vehicle dash.
D. Complete crimp connections
for all necessary wires.
E. Be sure to wrap any wires from
the Wiring Adaptor that are
not necessary (wires with no
match from the new receiver)
with electrical tape.
STEP 2 -- CRIMP CONNECTIONS
Tools & Parts
Required
Wire Stripper/Crimp Tool Crimp Caps
Unused Wire (tape over bare wires)
Receiver Wiring Adaptor
Generic Illustration
Generic Illustration
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1
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2
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