
IMPORTANT
The function of the RED and YELLOW wires is 
reversed for the vehicles listed below.  Yellow  
connects to Ignition and Red connects to 12V 
Constant.
1997-'02 Porsche Boxster
1999-'01 Porsche 911
!
Receiver Wiring Adaptor
120 70-1787
Revision 08/11/14
*
White - Left Front Speaker Positive
***
Red - 12 Volts Switched Power
***
Yellow - 12 Volts Constant Power
*
Gray - Right Front Speaker Positive
*
Gray/Black - Right Front Speaker Negative
***
Orange - Illumination
*
White/Black - Left Front Speaker Negative
***
Black - Chassis Ground
***
Blue - Power Antenna
STEP 1 -- CONNECT WIRES
*120701787*
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.
***
Blue/White - Amplifier Turn-On
**
White - Left Front AMP Input
***
Violet - Right Rear AMP Input
***
Green - Left Rear AMP Input
**
Gray - Right Front AMP Input
WIRE APPLICATION GUIDE
*
   Use in vehicles without factory-equipped  
   Premium or Bose system.
**
  Use in vehicles with factory Premium or  
 Bose system.
***
 Use in vehicles with either system. 
NOTE:  The long red wire included applies to certain vehicles that require a switched power source at the fuse panel.  See page 2 for specific applications.
Long Red Wire - See page 2 for applications.
*Asterisks denote referral to Wire Application Guide below.
Copyright 2014  Crutchfield Corporation
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.
If your receiver does not have a Dimmer or Illumination wire, tape off the Orange wire.
Connect the Black wire to the Ground wire of the new receiver.  
Individually tape off any unused wires.
Make final wiring connections following instructions on page 3.
A.
B.
C.
D.
E.