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<h1 id="firstHeading" class="firstHeading" lang="en">Connectors for car audio</h1>
<div id="bodyContent" class="mw-body-content">
<div id="siteSub" class="noprint">From Wikipedia, the free encyclopedia</div>
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<div id="mw-content-text" lang="en" dir="ltr" class="mw-content-ltr"><div class="mw-parser-output"><p>Several types of <b>connectors for car audio</b> systems are used.
</p>
<div id="toc" class="toc"><input type="checkbox" role="button" id="toctogglecheckbox" class="toctogglecheckbox" style="display:none" /><div class="toctitle" lang="en" dir="ltr"><h2>Contents</h2><span class="toctogglespan"><label class="toctogglelabel" for="toctogglecheckbox"></label></span></div>
<ul>
<li class="toclevel-1 tocsection-1"><a href="#Splicing_wires"><span class="tocnumber">1</span> <span class="toctext">Splicing wires</span></a>
<ul>
<li class="toclevel-2 tocsection-2"><a href="#Power_and_ground"><span class="tocnumber">1.1</span> <span class="toctext">Power and ground</span></a></li>
<li class="toclevel-2 tocsection-3"><a href="#Speakers"><span class="tocnumber">1.2</span> <span class="toctext">Speakers</span></a></li>
<li class="toclevel-2 tocsection-4"><a href="#Amplifier_and_Antenna"><span class="tocnumber">1.3</span> <span class="toctext">Amplifier and Antenna</span></a></li>
<li class="toclevel-2 tocsection-5"><a href="#Phone_And_Others"><span class="tocnumber">1.4</span> <span class="toctext">Phone And Others</span></a></li>
</ul>
</li>
<li class="toclevel-1 tocsection-6"><a href="#ISO_10487_Harness_Adapter"><span class="tocnumber">2</span> <span class="toctext">ISO 10487 Harness Adapter</span></a>
<ul>
<li class="toclevel-2 tocsection-7"><a href="#Parts"><span class="tocnumber">2.1</span> <span class="toctext">Parts</span></a></li>
<li class="toclevel-2 tocsection-8"><a href="#Power_(A)"><span class="tocnumber">2.2</span> <span class="toctext">Power (A)</span></a></li>
<li class="toclevel-2 tocsection-9"><a href="#Loudspeaker_(B)"><span class="tocnumber">2.3</span> <span class="toctext">Loudspeaker (B)</span></a></li>
<li class="toclevel-2 tocsection-10"><a href="#Miscellaneous_(C)"><span class="tocnumber">2.4</span> <span class="toctext">Miscellaneous (C)</span></a></li>
<li class="toclevel-2 tocsection-11"><a href="#Navigation_(D)"><span class="tocnumber">2.5</span> <span class="toctext">Navigation (D)</span></a></li>
</ul>
</li>
<li class="toclevel-1 tocsection-12"><a href="#Quadlock"><span class="tocnumber">3</span> <span class="toctext">Quadlock</span></a></li>
<li class="toclevel-1 tocsection-13"><a href="#See_also"><span class="tocnumber">4</span> <span class="toctext">See also</span></a></li>
<li class="toclevel-1 tocsection-14"><a href="#External_links"><span class="tocnumber">5</span> <span class="toctext">External links</span></a></li>
</ul>
</div>
<h2><span class="mw-headline" id="Splicing_wires">Splicing wires</span><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Connectors_for_car_audio&amp;action=edit&amp;section=1" title="Edit section: Splicing wires">edit</a><span class="mw-editsection-bracket">]</span></span></h2>
<p><a href="/wiki/Electrical_splice" class="mw-redirect" title="Electrical splice">Splicing wires</a> used in <a href="/wiki/Car_audio" class="mw-redirect" title="Car audio">car audio</a> are mainly for power, ground, amplifier and antenna, speakers, phone and others.
</p>
<h3><span class="mw-headline" id="Power_and_ground">Power and ground</span><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Connectors_for_car_audio&amp;action=edit&amp;section=2" title="Edit section: Power and ground">edit</a><span class="mw-editsection-bracket">]</span></span></h3>
<ul><li><b>ACC</b> (<b>red</b>), supplies +12V power to car audio and other accessories, only when the car is <a href="/wiki/Ignition_switch" title="Ignition switch">ignited</a>.</li>
<li><b>Constant</b> (<b>yellow</b>), also called BAT or Battery, provides permanent +12V power from battery.</li>
<li><b>Illumination</b> (<b>orange with white stripe</b>) or <a href="/wiki/Dimmer" title="Dimmer">dimmer</a>, when it is night and cars lights are turned on, head unit screen illumination is dimmed.</li>
<li><b><a href="/wiki/Ground_and_neutral" title="Ground and neutral">Ground</a></b>, abbrev. as <b>GND</b> (<b>black</b>), 0V, usually connected to the <a href="/wiki/Rolling_chassis" title="Rolling chassis">vehicle's metal chassis</a> and body.</li></ul>
<h3><span class="mw-headline" id="Speakers">Speakers</span><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Connectors_for_car_audio&amp;action=edit&amp;section=3" title="Edit section: Speakers">edit</a><span class="mw-editsection-bracket">]</span></span></h3>
<p>Wires with black stripe are for negative power:
</p>
<ul><li>Right front speaker: <b>gray</b>.</li>
<li>Left front speaker: <b>white</b>.</li>
<li>Right rear: <b>purple</b>.</li>
<li>Left rear: <b>green</b>.</li></ul>
<h3><span class="mw-headline" id="Amplifier_and_Antenna">Amplifier and Antenna</span><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Connectors_for_car_audio&amp;action=edit&amp;section=4" title="Edit section: Amplifier and Antenna">edit</a><span class="mw-editsection-bracket">]</span></span></h3>
<p>They have low <a href="/wiki/Amperage" class="mw-redirect" title="Amperage">amperage</a> and it is activated when radio is turned on.
</p>
<ul><li>Antenna: <b>blue</b>.</li>
<li><a href="/wiki/Amplifier" title="Amplifier">Amplifier</a> remote turn on: <b>blue</b> with white stripe.</li></ul>
<h3><span class="mw-headline" id="Phone_And_Others">Phone And Others</span><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Connectors_for_car_audio&amp;action=edit&amp;section=5" title="Edit section: Phone And Others">edit</a><span class="mw-editsection-bracket">]</span></span></h3>
<ul><li>Phone&#160;: the cable to mute when receiving a call, is <b>brown</b>.</li>
<li>Back view, <b>orange with white strip</b>, works when <a href="/wiki/Gear_stick" title="Gear stick">reverse gear</a> light is on and it is used to turn on back camera screen (i.e. when parking).</li>
<li>Steering Wheel Controls, SWC or Key, <b>brown with black stripe</b>, usually employs <a href="/wiki/CAN_bus" title="CAN bus">CAN bus</a>.</li></ul>
<h2><span class="mw-headline" id="ISO_10487_Harness_Adapter">ISO 10487 Harness Adapter</span><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Connectors_for_car_audio&amp;action=edit&amp;section=6" title="Edit section: ISO 10487 Harness Adapter">edit</a><span class="mw-editsection-bracket">]</span></span></h2>
<div class="thumb tright"><div class="thumbinner" style="width:222px;"><a href="/wiki/File:ISO_connectors_for_head_unit_in_car.JPG" class="image"><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/6/63/ISO_connectors_for_head_unit_in_car.JPG/220px-ISO_connectors_for_head_unit_in_car.JPG" decoding="async" width="220" height="165" class="thumbimage" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/63/ISO_connectors_for_head_unit_in_car.JPG/330px-ISO_connectors_for_head_unit_in_car.JPG 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/63/ISO_connectors_for_head_unit_in_car.JPG/440px-ISO_connectors_for_head_unit_in_car.JPG 2x" data-file-width="2592" data-file-height="1944" /></a> <div class="thumbcaption"><div class="magnify"><a href="/wiki/File:ISO_connectors_for_head_unit_in_car.JPG" class="internal" title="Enlarge"></a></div><a href="/wiki/International_Organization_for_Standardization" title="International Organization for Standardization">ISO</a> 10487 connector in car, fits into <a href="/wiki/Head_unit" class="mw-redirect" title="Head unit">head unit</a></div></div></div>
<p><b><a href="/wiki/ISO_standard" class="mw-redirect" title="ISO standard">ISO</a> 10487</b> was created in 1995 and defines a standard for connectors for the <a href="/wiki/Head_unit" class="mw-redirect" title="Head unit">head unit</a> to the car's electrical system, consisting of a system of four different <a href="/wiki/Electrical_connector" title="Electrical connector">connectors</a> typically used in <a href="/wiki/Head_unit" class="mw-redirect" title="Head unit">head units</a> for <a href="/wiki/Car_audio" class="mw-redirect" title="Car audio">car audio</a>.
</p>
<div class="thumb tright"><div class="thumbinner" style="width:222px;"><a href="/wiki/File:ISO_10487_connector_pinout.svg" class="image"><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/3/34/ISO_10487_connector_pinout.svg/220px-ISO_10487_connector_pinout.svg.png" decoding="async" width="220" height="276" class="thumbimage" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/34/ISO_10487_connector_pinout.svg/330px-ISO_10487_connector_pinout.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/3/34/ISO_10487_connector_pinout.svg/440px-ISO_10487_connector_pinout.svg.png 2x" data-file-width="265" data-file-height="333" /></a> <div class="thumbcaption"><div class="magnify"><a href="/wiki/File:ISO_10487_connector_pinout.svg" class="internal" title="Enlarge"></a></div>ISO 10487 connector pinout (plug side of male, wiring side of female)</div></div></div>
<h3><span class="mw-headline" id="Parts">Parts</span><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Connectors_for_car_audio&amp;action=edit&amp;section=7" title="Edit section: Parts">edit</a><span class="mw-editsection-bracket">]</span></span></h3>
<p>Part 1 of the standard is dedicated to "Dimensions and general requirements" and Part 2 to "Performance requirements".
</p>
<h3><span id="Power_.28A.29"></span><span class="mw-headline" id="Power_(A)">Power (A)</span><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Connectors_for_car_audio&amp;action=edit&amp;section=8" title="Edit section: Power (A)">edit</a><span class="mw-editsection-bracket">]</span></span></h3>
<p>The first connector A is always present, is usually black in colour, and contains pins for power-supply, off/on (typically controlled by ignition key), optional control for a motorised antenna and so on.
</p>
<ul><li>On some cars the +12V Ignition and Battery positions are reversed, such as later <a href="/wiki/Volkswagen_Group" title="Volkswagen Group">Volkswagen Group</a> cars, <a href="/wiki/Peugeot_106" title="Peugeot 106">Peugeot 106</a>, <a href="/wiki/Vauxhall_Astra" title="Vauxhall Astra">Vauxhall Astra</a>, <a href="/wiki/Citro%C3%ABn_C3" title="Citroën C3">Citroën C3</a> and some <a href="/wiki/JCB_(company)" title="JCB (company)">JCB tractors</a>.</li>
<li>Pin 1 is optional; used for speed dependent volume control and possibly navigation.</li>
<li>Pin 2 is optional; used for phone mute</li>
<li>Pin 3 is optional; used for reversing lamp signal on Becker radios with navigation.</li>
<li>Pin 6 is optional; used for vehicle instrument illumination</li></ul>
<h3><span id="Loudspeaker_.28B.29"></span><span class="mw-headline" id="Loudspeaker_(B)">Loudspeaker (B)</span><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Connectors_for_car_audio&amp;action=edit&amp;section=9" title="Edit section: Loudspeaker (B)">edit</a><span class="mw-editsection-bracket">]</span></span></h3>
<p>The second connector B is for connecting four <a href="/wiki/Loudspeaker" title="Loudspeaker">loudspeakers</a>, front, rear, left and right, and is usually brown in colour.
</p>
<h3><span id="Miscellaneous_.28C.29"></span><span class="mw-headline" id="Miscellaneous_(C)">Miscellaneous (C)</span><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Connectors_for_car_audio&amp;action=edit&amp;section=10" title="Edit section: Miscellaneous (C)">edit</a><span class="mw-editsection-bracket">]</span></span></h3>
<p>The connector C is optional. Sometimes it appears as one 20-pin connector, often red in colour, or it may be divided into three separate connectors which may be hooked together, in which case C1 is usually yellow, C2 is usually green and C3 is usually blue in colour. The contact spacing is narrower than the other connectors, so the C connector is sometimes referred to as <i>mini-ISO</i>.
</p>
<table class="wikitable">
<caption>C1 (external amplifier)
</caption>
<tbody><tr>
<td colspan="2">1) line out left rear</td>
<td colspan="2">4) line out left front</td>
<td>
</td></tr>
<tr>
<td></td>
<td colspan="2">3) line out common ground</td>
<td colspan="2">6) +12V switched (out)
</td></tr>
<tr>
<td colspan="2">2) line out right rear</td>
<td colspan="2">5) line out right front</td>
<td>
</td></tr></tbody></table>
<table class="wikitable">
<caption>C2 (remote control)
</caption>
<tbody><tr>
<td colspan="2">7) receive data</td>
<td colspan="2">10) +12V switched (out)</td>
<td>
</td></tr>
<tr>
<td></td>
<td colspan="2">9) chassis ground</td>
<td colspan="2">12) remote control ground
</td></tr>
<tr>
<td colspan="2">8) transmit data</td>
<td colspan="2">11) remote control in</td>
<td>
</td></tr></tbody></table>
<table class="wikitable">
<caption>C3 (CD changer)
</caption>
<tbody><tr>
<td colspan="2">13) data in (bus)</td>
<td colspan="2">16) +12v switched (out)</td>
<td colspan="2">19) audio left
</td></tr>
<tr>
<td></td>
<td colspan="2">15) +12v permanent (out)</td>
<td colspan="2">18) audio ground</td>
<td>
</td></tr>
<tr>
<td colspan="2">14) data out</td>
<td colspan="2">17) data ground</td>
<td colspan="2">20) audio right
</td></tr></tbody></table>
<p>Note: ISO 10487 only defines the <i>physical</i> attributes of the connectors, <i>not</i> the pin/signal designations, which are <i>manufacturer-defined</i>.
The example above is oriented towards VW vehicles only.
</p>
<h3><span id="Navigation_.28D.29"></span><span class="mw-headline" id="Navigation_(D)">Navigation (D)</span><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Connectors_for_car_audio&amp;action=edit&amp;section=11" title="Edit section: Navigation (D)">edit</a><span class="mw-editsection-bracket">]</span></span></h3>
<p>The connector D is for <a href="/wiki/Satellite_navigation_system" class="mw-redirect" title="Satellite navigation system">satellite navigation systems</a>. It has 10 pins.
</p>
<h2><span class="mw-headline" id="Quadlock">Quadlock</span><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Connectors_for_car_audio&amp;action=edit&amp;section=12" title="Edit section: Quadlock">edit</a><span class="mw-editsection-bracket">]</span></span></h2>
<p>From 2000 and onwards, manufacturers, such as <a href="/wiki/BMW" title="BMW">BMW</a>, <a href="/wiki/Citroen" class="mw-redirect" title="Citroen">Citroen</a>, <a href="/wiki/Ford" class="mw-redirect" title="Ford">Ford</a>, <a href="/wiki/Mercedes_Benz" class="mw-redirect" title="Mercedes Benz">Mercedes Benz</a>, <a href="/wiki/Peugeot" title="Peugeot">Peugeot</a>, <a href="/wiki/Volkswagen" title="Volkswagen">Volkswagen</a>, <a href="/wiki/MG_Rover_Group" title="MG Rover Group">Rover</a>, <a href="/wiki/Audi" title="Audi">Audi</a>, <a href="/wiki/Seat" title="Seat">Seat</a>, <a href="/wiki/Opel" title="Opel">Opel</a> or <a href="/wiki/%C5%A0koda_Auto" title="Škoda Auto">Škoda</a> have sometimes started using a 40-pin connector instead, called the <i>Quadlock</i>. The Quadlock connector consists of a block of 16 flat pins analogous to the two main ISO 10487 connectors. While the physical contact pins are the same, the pin allocation is not entirely the same, and the connector housing is not compatible. In addition to the 16 pins, like ISO 10487, there are minor connectors for optional equipment. They fit within the frame of the main connector, and has coding so that they cannot be interchanged. Minor connector B has 12 pins for audio output signals. Minor connector C has 12 pins for various audio sources such as <a href="/wiki/CD" class="mw-redirect" title="CD">CD</a>-changers, <a href="/wiki/MP3_players" class="mw-redirect" title="MP3 players">MP3 players</a>.
</p>
<table class="wikitable">
<caption>Quadlock A
</caption>
<tbody><tr>
<td>1) right rear +</td>
<td>5) right rear -</td>
<td></td>
<td>9) I-bus (BMW) / CAN High</td>
<td>13) antenna (out)
</td></tr>
<tr>
<td>2) right front +</td>
<td>6) right front -</td>
<td></td>
<td>10) phone mute / (Speed Signal)</td>
<td>14) illumination
</td></tr>
<tr>
<td>3) left front +</td>
<td>7) left front -</td>
<td></td>
<td>11) tel on / CAN Low</td>
<td>15) 12V battery
</td></tr>
<tr>
<td>4) left rear +</td>
<td>8) left rear -</td>
<td></td>
<td>12) ground</td>
<td>16) 12V switched
</td></tr>
</tbody></table>
<h2><span class="mw-headline" id="See_also">See also</span><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Connectors_for_car_audio&amp;action=edit&amp;section=13" title="Edit section: See also">edit</a><span class="mw-editsection-bracket">]</span></span></h2>
<ul><li><a href="/wiki/CAN_bus" title="CAN bus">CAN bus</a></li>
<li><a href="/wiki/Car_antenna_jack" class="mw-redirect" title="Car antenna jack">Car antenna jack</a></li>
<li><a href="/wiki/Car_radio" class="mw-redirect" title="Car radio">Car radio</a></li>
<li><a href="/wiki/Dashboard" title="Dashboard">Dashboard</a></li>
<li><a href="/wiki/Dashcam" title="Dashcam">Dashcam</a></li>
<li><a href="/wiki/Fuse_(automotive)" title="Fuse (automotive)">Fuse (automotive)</a></li>
<li><a href="/wiki/ISO_7736" title="ISO 7736">ISO 7736</a>, standard for car radio enclosures</li>
<li><a href="/wiki/Car" title="Car">Car</a></li>
<li><a href="/wiki/Universal_steering_wheel_control_interface" class="mw-redirect" title="Universal steering wheel control interface">Universal steering wheel control interface</a></li></ul>
<h2><span class="mw-headline" id="External_links">External links</span><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Connectors_for_car_audio&amp;action=edit&amp;section=14" title="Edit section: External links">edit</a><span class="mw-editsection-bracket">]</span></span></h2>
<ul><li><a rel="nofollow" class="external text" href="http://pinoutsguide.com/CarAudio/car_audio_iso_pinout.shtml">Car Audio ISO</a> connector <a href="/wiki/Pinout" title="Pinout">pinout</a>.</li>
<li><a rel="nofollow" class="external text" href="http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=21094">ISO 10487 Passenger car radio connections</a>
<ul><li>Part 1: Dimensions and general requirements</li>
<li>Part 2: Performance requirements</li></ul></li></ul>
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<li class="interlanguage-link interwiki-ca"><a href="https://ca.wikipedia.org/wiki/Connector_Car-audio" title="Connector Car-audio – Catalan" lang="ca" hreflang="ca" class="interlanguage-link-target">Català</a></li><li class="interlanguage-link interwiki-de"><a href="https://de.wikipedia.org/wiki/ISO_10487" title="ISO 10487 – German" lang="de" hreflang="de" class="interlanguage-link-target">Deutsch</a></li><li class="interlanguage-link interwiki-es"><a href="https://es.wikipedia.org/wiki/Conector_Car-audio" title="Conector Car-audio – Spanish" lang="es" hreflang="es" class="interlanguage-link-target">Español</a></li><li class="interlanguage-link interwiki-fr"><a href="https://fr.wikipedia.org/wiki/Connecteurs_autoradio_(ISO_10487)" title="Connecteurs autoradio (ISO 10487) – French" lang="fr" hreflang="fr" class="interlanguage-link-target">Français</a></li><li class="interlanguage-link interwiki-it"><a href="https://it.wikipedia.org/wiki/ISO_10487" title="ISO 10487 – Italian" lang="it" hreflang="it" class="interlanguage-link-target">Italiano</a></li><li class="interlanguage-link interwiki-no"><a href="https://no.wikipedia.org/wiki/ISO_10487" title="ISO 10487 – Norwegian" lang="no" hreflang="no" class="interlanguage-link-target">Norsk</a></li><li class="interlanguage-link interwiki-ru"><a href="https://ru.wikipedia.org/wiki/ISO_10487" title="ISO 10487 – Russian" lang="ru" hreflang="ru" class="interlanguage-link-target">Русский</a></li><li class="interlanguage-link interwiki-fi"><a href="https://fi.wikipedia.org/wiki/ISO_10487" title="ISO 10487 – Finnish" lang="fi" hreflang="fi" class="interlanguage-link-target">Suomi</a></li><li class="interlanguage-link interwiki-sv"><a href="https://sv.wikipedia.org/wiki/ISO_10487" title="ISO 10487 – Swedish" lang="sv" hreflang="sv" class="interlanguage-link-target">Svenska</a></li><li class="interlanguage-link interwiki-yo"><a href="https://yo.wikipedia.org/wiki/ISO_10487" title="ISO 10487 – Yoruba" lang="yo" hreflang="yo" class="interlanguage-link-target">Yorùbá</a></li> </ul>
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