Metra Electronics 99-3012G - Vehicle-Specific Wiring; Interface Programming and Adjustments

99-3012G
5
Installing the Interface
Amplified vehicles:
• ConnecttheVioletwiretotherightrearpositive
wireoftheaftermarketradio
• ConnecttheViolet/Blackwiretotherightrear
negativewireoftheaftermarketradio
• ConnecttheGreenwiretotheleftrearpositivewire
oftheaftermarketradio
• ConnecttheGreen/Blackwiretotheleftrear
negativewireoftheaftermarketradio
Non-amplified vehicles:
• CuttheresistorsfromtheGreen, Green/black,
Purple, Purple/Blackrightbelowtheheatshrink
• ConnecttheVioletwiretotherightrearpositive
wireoftheaftermarketradio
• ConnecttheViolet/Blackwiretotherightrear
negativewireoftheaftermarketradio
• ConnecttheGreenwiretotheleftrearpositivewire
oftheaftermarketradio
• ConnecttheGreen/Blackwiretotheleftrear
negativewireoftheaftermarketradio
ThePinkwireisnotusedinthisapplication.
Installing the Interface:
1. Withalltheconnectionscompleted,plugthe16and
22pinharnessesintotheinterface.
2.Plugthe44pinGMharnessintothevehicleside
harness,andplugtheaftermarketradioharnessinto
theaftermarketradio.
3. Reconnectthenegativebatteryterminal.
Programming:
• YoumustcycletheA/Cfanspeedallthewaytohigh
andbacktolowwhenyoufirstinstallthekit.
Note: Continue to the “Testing the Interface” section
if you do not have factory audio controls on the
steering wheel.
Chime Volume Adjustment
1) Withcaron,shutoffcarandleavekeysin
ignition.Openthecardoorandleaveitopen.
Chimeswillbeheard.
2) Wait10seconds,thenwithasmallscrewdriver
adjustthepotentiometerfullycounterclockwise(all
thewayleft),thenclockwisetoraisechimelevel
andcounterclockwisetolowerthechimelevel.
3) Whenthevolumeisatthedesiredlevel,remove
thekeysfromtheignition.Thiswilllockthechime
volumeatitscurrentlevel.
Audio Level Adjustment
1) Startyourvehicleandturnontheradiohaving
audioplaying.
2) Turnyouraftermarketradio’svolumeup¾oftheway.
3) Withasmallscrewdriveradjustthepotentiometer
clockwisetoraisetheaudioleveland
counterclockwisetolowertheaudiolevel.
4) Onceatdesiredlevelyouraudioadjustment
iscomplete.
OnStar Level Adjustment
ToadjusttheOnStarvolumelevelfindthe
Black/Yellowwireonthe16-pinharness.Pushthe
blueOnStarbutton,whilethevoiceisspeakingtap
theBlack/Yellowwiretoground.Oncethevolumeis
setitwillstayatthatvolumeuntiltheBlack/Yellow
wireistappedtogroundagain.Thiscanbesetduring
installationandthenleftalone.Ifuseradjustmentis
desired,thecustomermayalsotap“VolumeUp”
or
downonthesteeringwheel(ifequipped)toadjustthe
OnStarlevel.
Additional 12-pin harness (ASWC-1)
• This12-pinharnessistobeusedinconjunction
withtheASWC-1(notincluded).Pleaserefertothe
ASWC-1instructionsforprogramming.