2003 merc c320 amp wire diagram
Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=137984
Printed Date: May 10, 2025 at 2:57 PM
Topic: 2003 merc c320 amp wire diagram
Posted By: bobbydachiu777
Subject: 2003 merc c320 amp wire diagram
Date Posted: December 16, 2014 at 11:04 PM
I'm looking to rewire the factory amplifier so I will be able to install an aftermarket head unit. I realize I will only be able to use 4 channels of the amplifier unless I add on another due do the fact I think there is 9 speakers or so in there. Customer doesn't care they just want a double din in it with back up cam but I need to bypass factory amplifier to do so. Any thoughts/wiring diagrams or colors?
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R.A.D. Equips
Replies:
Posted By: tonanzith
Date Posted: December 17, 2014 at 2:31 PM
Radio 12V RED / blue + radio, 8 pin plug, pin 4
Radio Ground brown - radio, 8 pin plug, pin 8
Radio Ignition (CAN bus)
Radio Illumination (CAN bus)
Factory Amp Turn-on blue/black (MOST wake up) radio, 10 pin plug, pin 4 or 18 pin plug, pin 10
Power Antenna black + radio, 8 pin plug, pin 5
Left Front Speaker (+/-) green - BROWN / green +,- radio, 8 pin plug, pins 5 and 6
If equipped, the amplifier is in the right side of the luggage compartment. On vehicles with amplifier, the speaker wires are green - BROWN / green at the amplifier, 26 pin plug, pins 13 and 21.
Right Front Speaker (+/-) orange - BROWN / orange +,- radio, 8 pin plug, pins 3 and 4
If equipped, the amplifier is in the right side of the luggage compartment. On vehicles with amplifier, the speaker wires are orange - BROWN / orange at the amplifier, 26 pin plug, pins 22 and 14.
Left Rear Speaker (+/-) pink - BROWN / pink +,- radio, 8 pin plug, pins 7 and 8
If equipped, the amplifier is in the right side of the luggage compartment. On vehicles with amplifier, the speaker wires are pink - BROWN / pink at the amplifier, 26 pin plug, pins 23 and 15.
Right Rear Speaker (+/-) white - BROWN / white +,- radio, 8 pin plug, pins 1 and 2
If equipped, the amplifier is in the right side of the luggage compartment. On vehicles with amplifier, the speaker wires are white - BROWN / white at the amplifier, 26 pin plug, pins 25 and 17.
Center Channel (+/-) gray - BROWN / gray +,- amplifier, 26 pin plug, pins 16 and 24
If equipped, the amplifier is in the right side of the luggage compartment.
Subwoofer (+/-) paralleled with rear speakers
If equipped, the amplifier is in the right side of the luggage compartment. On vehicles with amplifier, the subwoofer wires are purple - BROWN / purple (1); yellow - BROWN / yellow (2) at the amplifier, 26 pin plug, pins 19 and 11; 20 and 12.
Aux. Audio Input Left (+/-) black - brown +,- radio, 18 pin plug, pins 13 and 5
Aux. Audio Input Right (+/-) yellow - brown +,- radio, 18 pin plug, pins 4 and 5
RSE Video (+/-) N/A
RSE Audio Left (+/-) N/A
RSE Audio Right (+/-) N/A
Satellite Radio 12 Volts RED / black + Satellite Radio Control Unit, 3 pin plug, pin 2
If equipped, the Satellite Radio Control Unit is in the right side of the luggage compartment.
Satellite Radio Ground brown - Satellite Radio Control Unit, 3 pin plug, pin 1
Satellite Radio Ignition blue/black (MOST wake up) Satellite Radio Control Unit, 3 pin plug, pin 3
Satellite Radio Antenna (coaxial cable)
Satellite Audio Left (+/-) (MOST bus)
Satellite Audio Right (+/-) (MOST bus)
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Gary Sather
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