Upgrade Help Needed!

[09TahoeSS]

I am trying to add a pair of Rockford Fosgate amps, two 12" subs and new door speakers to my 09 Tahoe LT.
I have spent the last two weeks wiring and unwiring and taking bad advice from Crutchfield's "expert" advisors.

I want to keep the GM head unit and retain the factory chimes and controls. I have tried to wire in the amps using the speaker outputs directly off the radio, then before the Bose amp under the console, and then after the amp...but I cannot get audio to speakers.

I have bench tested amps (RF 750x and 400s) and both seem to work. Using spare speaker, I have checked audio to back of vehicle and have sound at each channel. I used iPod to send audio back to door speakers to check wiring and all have sound.

But...when hooked up, I have nothing. Have been told by JL Audio tech support that I should be able to wire without interface. Two other audio suppliers have stated different, and say that I do need PAC or some brand of interface to make it work and retain factory chimes, buzzers and such.

Can anyone help? I have downloaded enough wiring diagrams and How-To articles to clear a forest. I just want some tuneage.

Thanks,
Steve R
Durham, NC

 

[timjohnson22]

I will take pictures of part of my install. I am still using the factory head unit too.

 

[southbeach]

wiring layout

i´m in germany with my 2009 yukon deanli with original headunit(premium bose, navigation, rear Entertainment) .I need the layout of the 4 connectors on the back of the headunit to convert to an european specs headunit(frequencies,navigation europe)

Can you help me with an wiring diagram or link whre i can get the layout of the 4 connectors on the back of my headunit


thank you very much in advance

greetings from sunny germany

robert

 

[SmallXL]

did you wire the 12v switch (are the amps turning on/off with your car?)

 

[timjohnson22]

The wiring diagram is below. I am using (2) FM modulators and Rocksford Fostgate 3sixty. Are you getting power to the AMP's? All the wires you need are connected to the Bose AMP underneath the radio were the cup holders are. Are you using a multimeter? Let me know if you need some more help.

Radio 12v red/white + radio harness
Radio Ground black - radio harness
Radio Ignition (GMLAN Serial Data)
Radio Illumination yellow (dimmer) + radio harness
Factory Amp Turn-on same as power antenna wire
Power Antenna white + radio harness
LF Speaker +/- tan - gray +,- radio harness or amplifier
Notes: If equipped, the amplifier is under the rear of the center console.

At the amplifier, the left subwoofer wires are dk. blue/white (+) - lt. green/black (-). The right subwoofer wires are dk. green (+) - lt. blue/black (-).
RF Speaker +/- lt. green - dk. green +,- radio harness or amplifier
LR Speaker +/- brown - yellow +,- radio harness or amplifier
RR Speaker +/- dk. blue - lt. blue +,- radio harness or amplifier
Interface Module: Category:
Immobilizer Bypass Required:
Yes Type:
PASS-Key III+
Part #: 556UW
Alternate Part1 #: DesignTech 20402
Alternate Part2 #: DesignTech 29402
Notes: Standard on all models.
Smart Starter Kill Relays: Relay Type:
Starter Relay Location:
Engine compartment fusebox, Driver side
Part #: 6404A


12volts red/white (2A) + ignition harness
Notes: For high current 12V, use red/black (60A) and red/black (60A) at the fuse box, black 40 pin plug, pins F1 and E3, or go to the battery.
Ignition pink + ign harn or BCM, lt. grn plg, pin 14
Notes: The BCM (Body Control Module) is to the left of the steering column.
Parking Lights+ brown (L), brown (R) + underhood fuse box, blk 30 pin plug
Parking Lights- lt. blue - switch or BCM, natural plug, pin 8
Notes: The BCM (Body Control Module) is to the left of the steering column.
Headlight white - switch or BCM, natural plug, pin 12
Notes: The BCM (Body Control Module) is to the left of the steering column.
Trunk/Hatch Release pink (glass), gray (gate) - BCM, pink plug, pins 24 and 13
Notes: Meter these wires while opening the liftglass or liftgate from the handle on the rear liftgate.

The BCM (Body Control Module) is to the left of the steering column.

On vehicles with the power liftgate, use dk. green/white (-) at the switch in the overhead console.
Power Sliding Door N/A
Speed Sense yellow/black ECM, black 73 pin plug, pin 57
Notes: The ECM (Engine Control Module) is in the front driver side of the engine compartment.
Wipers gray + BCM, brown plug, pin 20
Notes: The BCM (Body Control Module) is to the left of the steering column.
LF Window up/dn dk. blue - brown A DDM, black 6 pin plug, pins 3 and 1
Notes: The DDM (Driver Door Module) is in the driver door.
RF Window up/dn dk. blue - brown A PDM, black 6 pin plug, pins 3 and 1
Notes: The PDM (Passenger Door Module) is in the passenger door.
LR Window up/dn dk. blue - brown A LR window switch in door, pins E, H
RR Window up/dn dk. blue - brown A RR window switch in door, pins E, H
Sun Roof open/close motor part of module
Sun Roof Limit/close N/A
Memory Seat 1 orange + switch or DDM, blk 26 pin plg, pin 5
Notes: Memory seat 1 is positive trigger thru a 2260 ohm resistor. Memory seat 2 is positive trigger thru a 4260 ohm resistor.

The DDM (Driver Door Module) is in the driver door.
Memory Seat 2 same as memory seat 1 wire +
Memory Seat 3 N/A +


Constant 12 volts WIRE GAGE TO SMALL CONNECT AT UNDERDASH FUSE BLOCK.
Ignition 12 volts PINK IGNITION SWITCH HARNESS
Starter NO STARTER WIRE SEE TECH ***
Dome Light GRAY/BLACK (+) AT BCM * C5 BROWN PIN E SEE TECH**
Trunk Pin Switch PINK/BLACK (-) AT BCM * C6 PINK PIN 15 SEE TECH**
Parking Lamp GREY/BLACK (-) AT MAIN SWITCH
Power Lock DR PU, PASS GR/BLK IN EACH DOOR DUE TO #203
Power Unlock DR TAN,PASS TAN MULTIPLEXING **
* BCM Located Below Steering Column Alt Dr Door Pin Is BROWN And Pass Door Pin Is BLACK/WHITE These Wires Are Located In The Doors Polarity Is Hard To Determin From Shop Manual.Drivers Rear L BLUE (-) Pass L GREEN/BLACK (-) At BCM Conn C6 Pins 14 and 15. ** Rear Doors And End Gate Can Be Cotroled From The BCM SEE TECH ** #203- See Reversal Rest at Ground Door Lock Diagram.

Tach Signal WHITE AT PCM * #241
Ignition #2 WHITE IGNITION SWITCH HARNESS
Ignition #3 ORANGE IGNITION SWITCH HARNESS
Accessory BROWN IGNITION SWITCH HARNESS
Neutral Safety WHITE (-) PCM CONN C3 PIN #13 *
Brake Light WHITE (+) AT SWITCH ABOVE BRAKE PEDAL
Reverse Light LIGHT GREEN (+) EITHER TAIL LT ASSY OR TRAILER CONN**
Rear Window Defrost N/A


*PCM Located On The Drivers Side Of The Motor. Tach Wire Is In The BLUE Conn (C1) Closest To The Firewall,Pin #49. Also Found Back Of Cluster in 24 pin GREY Conn Pin # A12 ** Also Found At BCM In 6 Pin Black Connector #241- GM Passlock 2004 Interface Diagram ( Wire Colors Are WHITE And PINK ) Use WHITE (Pin 5) & PINK (Pin 6) Wires At Ignition Switch Cut WHITE wire.

 

[09TahoeSS]

Yes, the amps are both on with ignition.

---------- Post added at 06:21 AM ---------- Previous post was at 06:10 AM ----------

Hey thanks for the wiring info. I have been printing out wiring diagrams from GM service manual. Went through RPO code list to make sure I was looking at correct diagram since there are 3-4 radio options.

I was expecting this to be a simple upgrade. I've tried wiring new amps from speaker outputs from back of radio, from speaker inputs at amp under console and speaker outputs from amp under console.

Have a multimeter, but do not know what to be checking...tell me and I'll check. I'm about ready to put it back stock and forget the whole idea.

Thanks for any additional advice.