Steering Wheel Interface install?

I'm thinking about a new pioneer head unit, but I really dont want to lose the steering wheel controls. I know the PAC-SWI interface is available, but everything from the instructions posted on the PAC website to the few installs posted here leave me a little baffled.

I'm comfortable enough with doing the install and programming - I've installed many head units and keyless entry units on my own, but I tend to do it the quick and dirty way by cutting and twisting into the wires. Never had a problem with other cars, but this is a lease, so it needs to be clean, reversible and I dont want to take any chances.

The PAC instructions were clearly not written with comprehension in mind, and its really not obvious at all which wires need to be tapped into. Can anyone explain really, really clearly what needs to be done? Pictures of the process even better.

Also, whats the cleanest and most foolproof way to tap into the wires, preferably without any soldering? Or better yet, is there a harness I can buy for the SWI?

I went to best buy and asked them how much it would cost to get a pro to tap into those few wires, told them I'd take it apart, program it, everything else myself. Probably 5-10 minutes of labor at most, and they told me $100. Thats an outrage.

If anyone in Long Island, NY wants to help me out on this (AKA youve done it before and wont mess it up), I'll def pay $40 for the time, and Ill bring the car to you.

 

I found one online from the pac-audio.com by choosing the SWI-PS and the prius from the drop down menu. I'd link it, but I dont have posts to allow me to do so yet.

If I'm understanding it correctly, only the black and the white wires on the SWI are being used. The 20-pin plug pictured I assume is the "other harness" with the wheel signals?

First, I have to splice the SWI black ground wire onto the wire connecting to pin 6. Then, I have to splice the SWI white wire onto the wire coming from pin 7. Then I have to splice a resistor into the wire connecting to pin 8, and splice the other end into the SWI white wire.

Then it says:

"Black wire: Connect the SWI-PS 's black wire to chassis ground. This is usually a black wire on the aftermarket wire kit.
Red wire: Connect the SWI-PS 's red wire to a switched +12volt wire. This is usually a red wire on the aftermarket wire kit."

Is this black wire the same as the one that was spliced to pin 6? Isnt it already grounded then? Why is it telling you to connect something already connected?

And I'm assuming then the red wire can just be spliced into the red wire on the harness for the head unit?

Can you show me a link of what you mean? Ive never used anything but twisting and electrical tape.

Can you explain that a little further? What other connector, and what wiring kit?

I'd probably understand it a little better if I actually had it on hand, but I dont want to go out and spend the money for it unless Im confident I can do it 100% right the first time without damaging anything.

Thanks for the help!

 

Hmm...so the kit doesnt even come with the proper resistor?

And how would you remove the quick splice connector? I just you could just cut off the new wire you attached, and the old wire should work just fine with the quick connect still attached?

 

That looks absolutely perfect for my needs. Thanks!