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DIN72552DIN72552isaDINstandardforautomobileelectricterminalnumbers,standardizingalmosteverycontactinanautomobilewithanumbercode.Thistablegivesmostfrequentlyusednumbers.ContactMeaningIgnitionSystem1Ignitioncoil,distributor,lowvoltage1a,1bdistributorwithtwoseparatecircuits2breakerpointsmagnetoignition4coil,distributor,highvoltage4a,4bdistributorwithtwoseparatecircuits,highvoltage7terminalonballastresistor,todistributor15Battery+fromignitionswitch15afromballastresistortocoilandstartermotorPreheatDieselEngine15preheatin17start19preheat(glow)Starter50startercontrolBattery15battery+throughignitionswitch30frombattery+direct30afrom2ndbatteryand12/24VRelay31returntobattery-ordirecttoground31areturntobattery-12/24Vrelay31breturntobattery-orgroundthroughswitch31creturntobattery-12/24VrelayElectricMotors32return33mainterminal(swapof32and33ispossible)33alimit33bfield33f2.slowrpm33g3.slowrpm33h4.slowrpm33Lrotationleft33RrotationrightTurnindicators49flasherunitin49aflasherunitout,indicatorswitchin49bout2.flashercircuit49cout3.flashercircuitC1stflasherindicatorlightC22ndflasherindicatorlightC33rdflasherindicatorlightLindicatorlightsleftRindicatorlightsrightL54lightsout,leftR54lightsout,rightACGenerator51DCatrectifiers51eas51,withchokecoil59ACout,rectifierin,lightswitch59acharge,rotorout64generatorcontrollightGenerator,VoltageRegulator61chargeindicator(chargecontrollight)B+battery+B-battery-D+Dynamo/ alternator diode +D-dynamo/alternatordiode-DFdynamofieldDF1dynamofield1DF2dynamofield2U,V,WACthreephaseterminalsLights54Brakelights55foglight56spotlight56aHeadlamphighbeamandindicatorlight56blowbeam56dsignalflash57parkinglights57aparkinglights57Lparkinglightsleft57Rparkinglightsright58licenceplatelights,instrumentpanel58dpanellightdimmerWiper/Washer53wipermotor+in53alimitstop+53blimitstopfield53cwasherpump53estopfield53iwipermotorwithpermanentmagnet,thirdbrushforhighspeedAcousticwarning71Beeperin71abeeperout,low71bbeeperout,high72hazardlightsswitch85chazardsoundonSwitches81opener81a1out81b2out82lockin82a1stout82b2ndout82z1stin82y2ndin83multipositionswitch,in83aoutposition183boutposition2Relay85relaycoil-86relaycoil+Relaycontacts87commoncontact87anormallyclosedcontact87bnormallyopencontact88commoncontact288anormallyclosedcontact288bnormallyopencontact2Additional52signalfromtrailer54gmagneticvalvesfortrailerbrakes75radio,cigarettelighter77doorvalvescontrol