AX-DSP T-Harness
The Axxess T-harness is a basic and simple plug-n-play harness for easy installation of the AX-DSP (sold separately) for vehicle
specific applications. Most T-harnesses created by Axxess will either have a 4-pin or 8-pin harness, with the speaker wires pinned.
If you are installing a 4-channel amplifier with the AX-DSP, leave these connectors disconnected. The only reason for connecting
these harnesses together would be if the AX-DSP is being used for adding a subwoofer amplifier only. Some T-harnesses require
additional wiring and/or installation steps. Refer to the following page for a pinout legend for the 20-pin harness, and also
additional wiring and notes.
AX-DSPHNS
INSTALLATION INSTRUCTIONS
TABLE OF CONTENTS
20-Pin Harness Pinout...........................................2
Additional Wiring & Notes ....................................3
Attention! Let the vehicle sit with the key
out of the ignition for a few minutes before
removing the factory radio. When testing the
aftermarket equipment, ensure that all factory
equipment is connected before cycling the
key to ignition.
AxxessInterfaces.com © COPYRIGHT 2018 METRA ELECTRONICS CORPORATION REV. 11/2/18 INSTAX-DPSHNS
20-PIN HARNESS PINOUT
Pin-1 Red Accessory Power
Pin-2 Brown Not Applicable
Pin-3 Pink CAN-HI (CAN +)
Pin-4 Black/Yellow Future Use
Pin-5 White/Black Front Left Speaker (-)
Pin-6 Gray/Black
Pin-7 Green/Black Rear Left Speaker (-)
Pin-8 Purple/Black
Pin-9 RCA Input 5 (-)
Pin-10 RCA Input 6 (-)
Front Right Speaker (-)
Rear Right Speaker (-)
Pin-11 Yellow Battery Power
Pin-12 Orange Control Wire for the AX-BASSKNOB
Pin-13 Blue/Pink CAN-LO (CAN -)
Pin-14 Black Ground
Pin-15 White Front Left Speaker (+)
Pin-16 Grey Front Right Speaker (+)
Pin-17 Green Rear Left Speaker (+)
Pin-18 Purple Rear Right Speaker (+)
Pin-19 RCA Input 5 (+)
Pin-20 RCA Input 6 (+)
Wire View of Harness
2
ADDITIONAL WIRING & NOTES
AX-DSP-CH5: There will be an extra harness included that will need to be connected to allow
audio from the radio when installing the AX-DSP and a 4-channel amplifier. Newer Chrysler
radios need a load on the speaker lines to provide audio out. This extra harness provides that
resistor load.
AX-DSP-FD2: If the vehicle is equipped with navigation and/or SYNC 3, connect the White and
White/Black wires from the 54-pin harness, (normally found at the LCD screen), to the White
and White/Black wires from the 20-pin harness. Then connect the 54-pin harness to the wiring
harness in the vehicle.
AX-DSP-GMLAN01: Some extra wiring to the factory harness will be required. The White and
White/Black wires from the 20-pin connector on the T-harness will need to be spliced into the
factory wiring. The splicing will be done at the Brown connector behind the radio, on the back
side of the connector (where the wires insert into the it). The wire cavities will be numbered.
Bear in mind that the colors from the Brown connector may not exactly match the picture.
• Connect the White wire from the 20-pin T-harness to pin-8 from the Brown factory
connector. (Figures A & B)
• Connect the White/Black wire from the 20-pin T-harness to pin-16 from the Brown factory
connector. (Figures A & B)
AX-DSP-HD2: Harley Davidson radios come pre-programmed with a preset EQ that cannot
be changed without flashing the radio. Only an authorized Harley Davidson Dealer can flash
the radio and flatten the factory EQ curve. Ask the Dealer to flash the radio to a flat EQ curve.
Without performing this task, the AX-DSP will not sound proper, and be very distorted.
(Figure A)
(Figure B)
REV. 11/2/2018 INSTAX-DSPHNS
3
AX-DSPHNS
INSTALLATION INSTRUCTIONS
If you are having difficulties with the installation
of this product, contact our Tech Support line
either by phone at 1-800-253-TECH, or email at
techsupport@metra-autosound.com. Before
doing so, look over the instruction booklet a
second time and ensure that the installation was
performed exactly as the instruction booklet
is stated. Have the vehicle apart and ready to
perform troubleshooting steps before contacting
Metra/Axxess Tech Support.
®
KNOWLEDGE IS POWER
Enhance your installation and fabrication skills by
enrolling in the most recognized and respected
mobile electronics school in our industry.
Log onto www.installerinstitute.com or call
800-354-6782 for more information and take steps
toward a better tomorrow.
Metra recommends MECP
certified technicians
AxxessInterfaces.com © COPYRIGHT 2018 METRA ELECTRONICS CORPORATION REV. 11/2/18 INSTAX-DPSHNS
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