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Thread: Looking for radio plug wiring diagram

  1. #1
    Join Date
    Jan 2016
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    South NJ
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    Looking for radio plug wiring diagram

    I am installing a double din android radio in my car. I have everything from the largest main connector harness done, and the smallest amp connector done. There is one plug left and I have no idea what those wires go to. I'm looking for the wires that go to the steering wheel volume control and seek buttons.

    I have the aftermarket adapter but my radio comes ready to wire into the steering wheel controls.

    Does anyone have a pinot or wiring diagram to the plugs that go into the back of the radio?
    2003 Marauder 300A
    #2928 of 7838
    Build date: 8/6/02
    Ship date: 5/28/03
    14.33 @ 96.82 with OLD engine
    6R80 swap in progress

    1968 Chevelle
    NA/Pump Gas 10.4 @ 128 mph
    416/4L85E LSA Supercharged build underway

  2. #2
    Join Date
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    Location
    Southwest Florida, Lee County
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    54
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    3,423
    On the main radio harness the integration wire for the steering wheel controls is pin 18, Lt/blue/red wire. You can program each button (vol up, vol down, source...) one at a time during programming of the interface module. The harness you have that connects to nothing may be for a trunk mounted CD changer. You're only going to have a large gray 40 pin connector and a small harness for the factory woofer. Tip: use a resistor on the OE amp turn on wire to prevent on/off pop. I can't remember the value but whatever works just test it to make sure the pop is gone.
    Last edited by BAD MERC; 10-21-2018 at 10:09 AM.
    '04 Silver Marauder w/ sunroof - HID lighting, JL Audio / Eclipse DVD/NAV/iPod/camera, 4.10's, 2" drop, Progard Bumper Baffle, Delete tips, Billet Pedals, BC4E dead pedal, Lidio Tune, Mach1 chin spoiler, K&N CAI, TCE lines, Super40's, tinted tails, SS Inserts, Heinous Control Arms, Real oil gauge, lighted door handles. Currently installing Eaton M112.

    2004 Mercury Marauder
    Born March 2004, adopted October 2005. Sold January 2012, adopted AGAIN January 2016
    2,187 of 3,214
    997 in Silver Birch
    448 with light flint interior
    304 with heated seats
    336 with sunroof

  3. #3
    Join Date
    Oct 2005
    Location
    Southwest Florida, Lee County
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    Also, the radio dimmer wire will not show voltage during testing unless you cover the ambient light sensor on the driver side of the dash. That keeps the radio from dimming into blackness during daytime driving with headlights on. For navigation, the gray/black wire is speed sense. These OE radios had speed dependant volume.
    '04 Silver Marauder w/ sunroof - HID lighting, JL Audio / Eclipse DVD/NAV/iPod/camera, 4.10's, 2" drop, Progard Bumper Baffle, Delete tips, Billet Pedals, BC4E dead pedal, Lidio Tune, Mach1 chin spoiler, K&N CAI, TCE lines, Super40's, tinted tails, SS Inserts, Heinous Control Arms, Real oil gauge, lighted door handles. Currently installing Eaton M112.

    2004 Mercury Marauder
    Born March 2004, adopted October 2005. Sold January 2012, adopted AGAIN January 2016
    2,187 of 3,214
    997 in Silver Birch
    448 with light flint interior
    304 with heated seats
    336 with sunroof

  4. #4
    Join Date
    Jan 2016
    Location
    South NJ
    Posts
    459
    Quote Originally Posted by BAD MERC View Post
    On the main radio harness the integration wire for the steering wheel controls is pin 18, Lt/blue/red wire on main radio harness. You can program each button (vol up, vol down, source...) one at a time during programming of the interface module. The harness you have that connects to nothing may be for a trunk mounted CD changer. You're only going to have a large gray 40 pin connector and a small harness for the factory woofer. Tip: use a resistor on the OE amp turn on wire to prevent on/off pop. I can't remember the value but whatever works just test it to make sure the pop is gone.
    Damn dude thanks. Yes I got the step down resistor on there, works great.

    So it's only one wire then?
    2003 Marauder 300A
    #2928 of 7838
    Build date: 8/6/02
    Ship date: 5/28/03
    14.33 @ 96.82 with OLD engine
    6R80 swap in progress

    1968 Chevelle
    NA/Pump Gas 10.4 @ 128 mph
    416/4L85E LSA Supercharged build underway

  5. #5
    Join Date
    Oct 2005
    Location
    Southwest Florida, Lee County
    Age
    54
    Posts
    3,423
    Yes, one wire does it all depending on resistance values.
    '04 Silver Marauder w/ sunroof - HID lighting, JL Audio / Eclipse DVD/NAV/iPod/camera, 4.10's, 2" drop, Progard Bumper Baffle, Delete tips, Billet Pedals, BC4E dead pedal, Lidio Tune, Mach1 chin spoiler, K&N CAI, TCE lines, Super40's, tinted tails, SS Inserts, Heinous Control Arms, Real oil gauge, lighted door handles. Currently installing Eaton M112.

    2004 Mercury Marauder
    Born March 2004, adopted October 2005. Sold January 2012, adopted AGAIN January 2016
    2,187 of 3,214
    997 in Silver Birch
    448 with light flint interior
    304 with heated seats
    336 with sunroof

  6. #6
    Join Date
    Jan 2016
    Location
    South NJ
    Posts
    459
    Do you know which ports I am plugging in the RCA jacks from the amp/sub?

    This is the adapter I have:
    https://www.amazon.com/Metra-70-5521...SIN=B000K50GTA

    This is plugging into an ATOTO A6
    2003 Marauder 300A
    #2928 of 7838
    Build date: 8/6/02
    Ship date: 5/28/03
    14.33 @ 96.82 with OLD engine
    6R80 swap in progress

    1968 Chevelle
    NA/Pump Gas 10.4 @ 128 mph
    416/4L85E LSA Supercharged build underway

  7. #7
    Join Date
    Oct 2005
    Location
    Southwest Florida, Lee County
    Age
    54
    Posts
    3,423
    The OE woofer is mono but there might be 2 RCA plugs, red and white on the radio. Plug them both into the SW or SUB output of your Android head unit. You may have RCA outputs that are configurable and their usage may be selectable in your setup menu. Regardless, you should be able to independently control the sub level from the new radio. Something the OE radio lacked.
    '04 Silver Marauder w/ sunroof - HID lighting, JL Audio / Eclipse DVD/NAV/iPod/camera, 4.10's, 2" drop, Progard Bumper Baffle, Delete tips, Billet Pedals, BC4E dead pedal, Lidio Tune, Mach1 chin spoiler, K&N CAI, TCE lines, Super40's, tinted tails, SS Inserts, Heinous Control Arms, Real oil gauge, lighted door handles. Currently installing Eaton M112.

    2004 Mercury Marauder
    Born March 2004, adopted October 2005. Sold January 2012, adopted AGAIN January 2016
    2,187 of 3,214
    997 in Silver Birch
    448 with light flint interior
    304 with heated seats
    336 with sunroof

  8. #8
    Join Date
    Jan 2016
    Location
    South NJ
    Posts
    459
    Yeah it looks like I'm only supposed to use the white rca into the sub audio out. Ok then. Glad I didn't push the unit all the way in yet.
    2003 Marauder 300A
    #2928 of 7838
    Build date: 8/6/02
    Ship date: 5/28/03
    14.33 @ 96.82 with OLD engine
    6R80 swap in progress

    1968 Chevelle
    NA/Pump Gas 10.4 @ 128 mph
    416/4L85E LSA Supercharged build underway

  9. #9
    Join Date
    Jan 2016
    Location
    South NJ
    Posts
    459
    I plugged the white RCA into the sub output. No change. If I plug it into a speaker input, that particular speaker increases in sound big time. What gives?
    Last edited by 376shovel; 10-21-2018 at 03:07 PM.
    2003 Marauder 300A
    #2928 of 7838
    Build date: 8/6/02
    Ship date: 5/28/03
    14.33 @ 96.82 with OLD engine
    6R80 swap in progress

    1968 Chevelle
    NA/Pump Gas 10.4 @ 128 mph
    416/4L85E LSA Supercharged build underway

  10. #10
    Join Date
    Jan 2016
    Location
    South NJ
    Posts
    459
    Here is the hookup for my car
    Attached Images Attached Images
    2003 Marauder 300A
    #2928 of 7838
    Build date: 8/6/02
    Ship date: 5/28/03
    14.33 @ 96.82 with OLD engine
    6R80 swap in progress

    1968 Chevelle
    NA/Pump Gas 10.4 @ 128 mph
    416/4L85E LSA Supercharged build underway

  11. #11
    Join Date
    Jan 2016
    Location
    South NJ
    Posts
    459
    Disregard. The single white RCA in the sub output did the trick, I just had to adjust settings in the head unit to notice it.

    Last problem I have is apparently my front driver speaker is either not wired correctly, or it took a dump on me.
    2003 Marauder 300A
    #2928 of 7838
    Build date: 8/6/02
    Ship date: 5/28/03
    14.33 @ 96.82 with OLD engine
    6R80 swap in progress

    1968 Chevelle
    NA/Pump Gas 10.4 @ 128 mph
    416/4L85E LSA Supercharged build underway

  12. #12
    Join Date
    Oct 2005
    Location
    Southwest Florida, Lee County
    Age
    54
    Posts
    3,423
    Glad to help. At least you're at the finish line.
    '04 Silver Marauder w/ sunroof - HID lighting, JL Audio / Eclipse DVD/NAV/iPod/camera, 4.10's, 2" drop, Progard Bumper Baffle, Delete tips, Billet Pedals, BC4E dead pedal, Lidio Tune, Mach1 chin spoiler, K&N CAI, TCE lines, Super40's, tinted tails, SS Inserts, Heinous Control Arms, Real oil gauge, lighted door handles. Currently installing Eaton M112.

    2004 Mercury Marauder
    Born March 2004, adopted October 2005. Sold January 2012, adopted AGAIN January 2016
    2,187 of 3,214
    997 in Silver Birch
    448 with light flint interior
    304 with heated seats
    336 with sunroof

  13. #13
    Join Date
    Jan 2016
    Location
    South NJ
    Posts
    459
    All done. Thanks for the help! I'm pretty damn happy with it.
    Attached Images Attached Images
    2003 Marauder 300A
    #2928 of 7838
    Build date: 8/6/02
    Ship date: 5/28/03
    14.33 @ 96.82 with OLD engine
    6R80 swap in progress

    1968 Chevelle
    NA/Pump Gas 10.4 @ 128 mph
    416/4L85E LSA Supercharged build underway

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