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Old 01-13-2011, 08:30 PM   #1
181stLeader
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Default Write up: Legacy Spec B steering wheel audio controls install into a 2005 WRX

Standard disclaimers apply; I am posting what I did and what worked for me. If you cause damage/harm to you or your car it is not the responsibility of me or NASIOC. Dealing with airbags is dangerous as they are explosive and can cause serious injury or death.

With that out of the way here we go!

This is my write up on how to install the Legacy Spec B steering wheel controls into my WRX with an aftermarket head unit. I don’t know how to hook up the SWC to the stock 6 disc changer so don’t ask.

In this write up, clock spring and roll connector mean the same thing.

Supplies/tools needed:

2007 Legacy Spec B steering wheel/3.0r LL Bean Edition Outback (wood section at the top of the steering wheel)

*You can also do what I did and use a 3 spoke momo steering wheel off of a 5EAT Legacy with the sport shift buttons, if you go this route you will need to purchase the Spec B audio control buttons part number: 83153AG000*

Metra Axxess ASWC Interface/PAC SWI-JACK SWC Interface
T-30 Torx bit
Phillips screw driver
Breaker bar
17mm socket
Wire cutters
Soldering iron
Solder/soldering paste
Heat shrink tubing/heat gun
Wire
Ring terminal
Zip ties
Electrical tape
Multi meter

Step 1. Disconnect the negative terminal of the battery. Step on the brake pedal for 20 sec to discharge and current in the system.

Step2. Center the steering wheel



Step 3. Using the T-30 torx loosen the two torx bolts on the side of the steering wheel to remove the airbag. These screws will not come out all the way.


Step 4. Gently pull on the airbag out of the steering wheel, you will notice that there is a wiring harness (yellow, this is the airbag harness) and a stray black wire with a spade connector (Horn switch) holding the airbag to the steering wheel. To remove the airbag harness there is a small yellow tab that must be pulled up(use your fingernail or a small flat bladed screwdriver) Then the airbag harness should detach easily. Unclip the black spade connector and the air bag should be free of the steering wheel. Make sure you put the airbag in a safe place where nobody is going to touch it.





Step 5. Disconnect the green cruise control harness from the clock spring/roll connector.

Step 6. Using the 17mm socket and the breaker bar break loose the 17mm nut that holds the steering wheel on. It is best to leave the nut on the steering column till you have pulled the steering wheel off so you don’t smack yourself in the face trying to pull off the steering wheel when it finally decides to let go. You can also use a steering wheel puller if you have one available. Once loose remove the nut and steering wheel.


*NOTE: the clock spring has a limited number of turns with the steering wheel off try not to turn it with the steering wheel off, if you force it you will break it.*
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Last edited by 181stLeader; 01-13-2011 at 08:41 PM.
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Old 01-13-2011, 08:30 PM   #2
181stLeader
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Step 7. Remove the lower half of the steering column cover (there is one Phillips head screw on the bottom center securing it) It will pop off after the screw is removed.


Step 8. Remove the top steering column cover. Circled in the picture are two Phillips head screws that need to be removed. I wasn’t able to completely remove the upper half of the column cover but it gave me enough room to get to the clock spring.





Step 9. There are 4 screws that hold the clock spring to the steering column. It will still be attached by the lower wiring harnesses. I’m sure you could find the plug downstream and be able to completely remove the clock spring form the car, but I didn’t because I had enough room to work in the car. Be careful handling the clock spring as it is very delicate and I have heard it is $300 at the dealer, try not to spin it with the steering wheel off. I was also able to free up some wiggling room by unwrapping the clock spring wires off of the steering column. I also cut the ziptie that secured the cruise control side.





Step 10. This part is tricky, I popped open (its held together by many pop tabs around it) the bottom half of the clock spring just enough to gain access to the wiring on the side without the yellow airbag wires coming out of it. DO NOT DISASSEMBLE the whole clock spring it will shoot out a ribbon cable that will be a very big hassle to put back(if that is even possible).

You don't want this:



Theses are not my pics, I stole them from a thread over at LGT.com and re-hosted them.

Be careful not to pull very much on the wires they are very delicate, just pull enough to expose the terminals. There are 3 terminals that don’t have any wires soldered to them. These are the ones we will be using (They correspond to the wires on the other side of the clock spring that have an unused connector to the very left. The legacy uses this plug for cruise control; it is unused on the WRX)




Last edited by 181stLeader; 01-13-2011 at 08:38 PM.
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Old 01-13-2011, 08:31 PM   #3
181stLeader
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Step 11. Solder a wire to each of the 3 unused copper terminals. Test for continuity between the newly solders wires and the front connector of the clock spring. This ensures the solder joints are good and that there are no shorts. Position the newly soldered terminal block back to where it belongs in the clock spring and snap it back together. Put a new zip tie on the one you cut off to secure the cruise harness as well as your new wires you just added. Route the new wires you soldered down the steering column the same way the factory routes the cruise and airbag harness. Use zipties or electrical tape to secure it. Ensure that no wires are getting pinched in the tilt wheel mechanism.


Step 12. Reinstall the clock spring. There are instructions in the service manual and on the clock spring itself to reinstall it. Turn the clock spring all the way to the right until it hits it’s stop. Now turn it to the left 3.25 turns. To get it exactly where it needs to go you line up two marks on the clock spring(they look like to triangles near the bottom of the moving part of the roll connector. When it is aligned properly the marks should be pointing at each other. Reinstall the steering column covers.

Step 13. This is where we need to do some splicing. The spec b audio controls use the same plug as the WRX cruise controls. The Spec B/LGT 5EAT wheel should come with a cruise control stalk that has the plug we need. I cut the white cruise control plug off the unused LGT/Spec B cruise stalk and spliced it into the Spec B audio controls.




Three wires are passed thought he clock spring. One wire is the signal wire for the SWC, the second is the power for the illumination of the buttons and the third is a ground for the SWC and illumination. The spec b plug is labeled from Right to left pin 1 is a blue wire (this is the signal wire for the SWC) 2 is a red wire (this is the ground for the SWC) 3 is a white wire (ground for the illumination) 4 is orange (It’s the power for the illumination). What I did was twisted wires 2 and 3 together and soldered them to the third wire going through the clock spring. Wires 1 and 4 were then wired to the white plug we cut off of the LGT/spec B cruise control stalk.


*Note: if using a LGT 5EAT wheel to remove the old shift buttons you have to remove the back cover of the steering wheel to gain access to 2 screws that hold the shift/audio buttons to the steering wheel.*





Now we should have everything ready to plug back in and reinstall the steering wheel.

Last edited by 181stLeader; 01-13-2011 at 11:19 PM.
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Old 01-13-2011, 08:31 PM   #4
181stLeader
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Step 14. To wire up the illumination we need to tap into a 12volt source that comes on when the lights do. I just taped into the violet wire that goes to the fog switch illumination. Solder a ring terminal on the 3rd wire(ground wire for illumination and the SWC) we have ran down the steering column and attach it to a suitable bolt that will be a good ground.

Step 15. This is where your install may be different. Many people use the SWC interface from PAC. The reviews I read said that the Metra interface performed better. To install the Metra Axxess AWSC box. It install easy, you need to hook up the red wire(pin 12) to a switched 12volts. Ground pins #2(white and green) and pin 6(black wire) for the Axxess box. Only other pin that needs to be connected is pin 5, (Grey/Red in color, connect this to the SWC wire we ran down the roll connector.

Step 16. Enjoy your Spec B steering wheel audio controls!




Last edited by 181stLeader; 03-05-2017 at 07:08 PM. Reason: Typo in wire colors
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Old 01-13-2011, 11:54 PM   #5
Rexben
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Great step by step explanation on setting up the steering wheel controls! Thanks for letting me know about the roll connector.
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Old 01-14-2011, 12:44 PM   #6
dustincredible
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Awesome write up!
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Old 01-14-2011, 04:08 PM   #7
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:applause:
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Old 01-15-2011, 03:57 AM   #8
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nice job!
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Old 01-15-2011, 01:21 PM   #9
181stLeader
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Thanks for the positive feed back. I'm really liking this mod
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Old 01-17-2011, 12:25 PM   #10
nategr8ns
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Oh man... I want this. Too bad, I don't think any wheels with aux controls fit on '99s, not to mention I doubt my clockspring has the extra wires.
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Old 01-17-2011, 04:53 PM   #11
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Nice, so does the clock spring (turn off signals) and cruise control still work? I assume this should also work on an 02?
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Old 01-18-2011, 04:38 AM   #12
181stLeader
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Quote:
Originally Posted by nategr8ns View Post
Oh man... I want this. Too bad, I don't think any wheels with aux controls fit on '99s, not to mention I doubt my clockspring has the extra wires.
I'm pretty sure any impreza wheel will fit on any other impreza. I have seen pics of GC's with GD steering wheels. I dont know about the clock spring. You could pull off your airbag and find out.

Quote:
Originally Posted by BeBop86 View Post
Nice, so does the clock spring (turn off signals) and cruise control still work? I assume this should also work on an 02?
Yup, everything still works, horn, cruise, no airbag light. As for it working on the 02's I'm not sure. it depends on if the 02 clockspring has the extra plug slot on the left where I plugged in the white connector. If it does you will just need a 3 spoke wheel out of a legacy 5EAT or spec B and the airbag to go with it. You could pop off your air bag and see
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Old 02-14-2011, 08:15 PM   #13
cbarbu
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I posted this Q on the "swap 08 onto 05" thread:
Do anybody know if legacy control buttons fit a GD DAMD wheel?
Thx!!
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Old 02-26-2011, 02:28 PM   #14
cbarbu
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Thanks man...


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Old 04-21-2011, 04:46 AM   #15
181stLeader
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Looks, good. Glad my write up was helpful. Good to know it works on that wheel.
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Old 07-01-2011, 11:57 AM   #16
Ryan321
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Hey i have a queston. I have a 2001 impreza and a 2005 legacy wheel, what are the pinouts for the cruse control, i really want the cruse to work, never worked when I bought the car.Also, i have the horn unpluged because the airbag seems to constantly ground and it will not fit snug when bolted to the wheel causing the horn to turn on when i turn the wheel......
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Old 04-06-2014, 04:28 PM   #17
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Old 04-11-2014, 04:14 AM   #18
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I think the steering wheel part number is 34311AG19AJC
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Old 02-12-2017, 09:09 PM   #19
Performance Suby
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Quote:
Step 15. This is where your install may be different. Many people use the SWC interface from PAC. The reviews I read said that the Metra interface performed better. To install the Metra Axxess AWSC box. It install easy, you need to hook up the red wire(pin 12) to a switched 12volts. Ground pins #2(grey and redwire) and pin 6(black wire) for the Axxess box. Only other pin that needs to be connected is pin 5(connect this to the SWC wire we ran down the roll connector.
The write up is much appreciated, however I believe you mixed up the corresponding wire colors for pin 2 & 5 for the METRA Axxess ASWC box.

I believe pin 5 (gray/red) is suppose to be connected to the SWC signal wire from the steering wheel, while pin 2 (white/green) is suppose to be grounded with pin 6 (black) from the Axxess box.

Below is a link to the pdf file from Metra, pg 5 shows the pin out for the ASWC box.

http://metraonline.com/files/products/INSTASWC_web.pdf

Here's another link for Axxess box installation into a 3rd gen Outback with SWC. You will see on the 1st pg, point #4 states to ground the white/green wire (pin 2) with the black wire (pin 6) of the Axxess box. There is also some additional information on the 2nd pg in the link below for wiring in aftermarket head units.

https://metradealer.com/files/aswc/ASWC-1_INST_953.pdf

Please confirm if this correct, and if possible edit your write up, to prevent any future diy-er errors.

Last edited by Performance Suby; 03-11-2017 at 11:00 PM.
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Old 03-05-2017, 07:05 PM   #20
181stLeader
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The pinouts are correct, but I did have a typo on the color, I will correct that. I'm glad the write up was useful to you. I have these controls on my 2005 forester XS(the roll conector in the 05+forester is pre wired for the controls too so you don't have to solder to the roll connector!)

Last edited by 181stLeader; 03-05-2017 at 07:11 PM.
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Old 10-03-2017, 04:18 PM   #21
javishm
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I did my wiring for a 07 Forester.

From the Info you posted I can connect the Illumknation and the SWC negoative togethet the at the clock spring harness
My harness only had four wires and is giving me a hard time to add the fifth one
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Old 11-10-2019, 02:12 AM   #22
AZRich
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Thank you for this! Super-helpful.
05 Saabaru now has audio controls on swapped steering wheel.
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