PAC SWI-RC Steering Wheel Control Interface Designed for All Major Radio Brands, Universal Interface SWI-RC1

Excellent product at a great price. I wish it came with paper instructions but the online guide is pretty easy to use and tells you exactly what you need to wire it into your wiring harness for whatever make and model car you have.

Installed in a 2003 Cadillac Deville. Coupled with PAC OS2-GM32X Retains factory on star and using existing amp. The factory system is only 2 channels. Hence no fade option on factory radio. So you only have 2 channel wires on the OS2-GM32X device. All speakers worked perfectly. The door chime I guess came from factory radio as it comes from this device now.Paired with a PAC SWI-RC-1 retained steering wheel controls. Picture shows correct dip switch settings when used with OS2-GM32X. Note the longer dip switches are what makes it communicate with car. The 4 dip switches depends on your aftermarket radio. No wiring needed just plug the SWI-RC-1 into the OS2-GM32X and the 3.5 mm plug into aftermarket radio.The picture of the dip switches are only when used with the OS2-GM32X.Lastly - I did not have the Bose system.

I brought 3 of these. The first one i received did not work and had the smell of being burnt coming out of the box. Instructions are completely vague and totally useless for any full sized General Motors truck from 99-2002.This section is for all the gmt400 folks who do the UK3 steering wheel control upgrades using buttons from Bravada,Blazer, Jimmy, S-10, Yukon Denali and Escalade.OrIf you own a 99-2002Bravada, Blazer, Jimmy, S10, Yukon Denali, Escalade with Factory UK3 steering wheel controlsThis unit can work but not with the given instructions from the website. If you want this unit to work properly when you go on the website and set the vehicle for a 1994-1996 Oldsmobile nintey eight or Eighty eight. Both of these vehicles had factory steering wheel controls. The Dipswitch setting for the 8 switch location is absolutely WRONG. The unit will not recognize the button inputs. What I did was set my Dipswitches as if it was in a 1996 Oldsmobile Nintey eight and finally I saw results. The Dipswitch setting they recommend for all the full and midsized trucks is 1 down, 2 up, 3 up, 4 down, 5 up, 6 down ,7 up, 8 up. You will not get results with this. Or at least I did not. I used the Oldsmobile set up which was1 up, 2 3 4 down, 5 up, 6 down, 7 8 up.This section is for all with an Atoto A6, a6 pro and probably just about any Atoto Android radio.The Dip switch section here is also wrong on the website. This is a 4 switch section that is to pair with whatever radio you are using. For atoto the Dipswitch setting on the website reads out 1 up 2, down, 3 down, 4 up. THIS IS WRONG!. In fact so wrong that the unit does not even recognize input from and of your buttons. The red led light will not turn green confirming that it recognized any inputs from your steering wheel controls. I got mine to work using the Dipswitch settings of 1 2 3 down, 4 up. As stated by PAC This setting is most commonly used by pioneer units.On the Wiring harnesses there are no instructions out of the box that will tell you what wire does what. The website does give you most of what's important such as ground, 12v accessory and 12 v analog (positive wire from your steering wheel control) but that harness has like 12 or 13 other wires so your kind of left with confusion for a bit.Hooking this up to an Atoto unitThe other wire harness has a 4 wire harness with a blue/yellow wire, Brown wire, a ground, and a 3.5 mm jack. That 3.5 mm jack is useless, even though I've seen a video on YouTube pairing this unit with an Atoto a6 and the guy states that the 3.5 mm jack is all you need 🤦🏾‍♂️. I've left several questions on said video about how it was hooked up but no answers of course.You will take the blue/yellow wire, brown wire, and connect them. Now from the atoto radio you will have a brown steering key #(+) and orange with black stripe Steering wheel key (+) connect those together. Now you will take all four of those wires and connect them together and it should work. Again the website tells you none of this and I had to spend hours finding out for myself.I have noticed it works but is very laggy. The unit recognizes the input and will turn green as the buttons are pressed but it doesn't do that great of a job communicating with the radio. This is the first interface I have ever used so I cannot compare it to others, but I will say if you have the extra money get a few universal interfaces and see what works best for you. Or at least use one that has clear correct instructions. I'm not displeased with the interface nor am I completely satisfied. But I am displeased at the blatant wrong information being put out on their website. I was told "Pac" was top teir when it came to this kind of stuff but obviously they missed their mark on this one. Sorry for the long review but if I can help someone out then all this time spent was worth it.

The unit I received was the PAC SWI-RC1. To install this unit, you'll need to put in the make of your vehicle and which radio you are using on the PAC website. In some cases, the vehicle you are installing this into is not on the official supported list, however in this case, you can still go with a manual setup. Once you put in the needed information, you'll be given detailed instructions on which wires to attach (and which ones to not use), and instructions on how to program the head unit. The setup type and radio type are programmed into the unit using DIP switches on the side. The unit also has a USB connection for firmware updates. For manual setup, the unit allows you to program the specific buttons on your steering wheel to perform specific functions tailored to your head unit.For many aftermarket head units, you must use this interface adapter to connect your aftermarket head unit with your steering wheel controls... however - some aftermarket units do not need this adapter when your vehicle uses analog resistor network buttons on the steering wheel. I bought this originally to go with a JVC KW-M590BT. The JVC unit would require the use of this interface adapter to translate the signals from the buttons in my vehicle with the head unit. But due to fitment issues, I ended up going with the Atoto F7G2A7WE head unit. As this was my first aftermarket head unit installation, I went ahead and wired up and programmed the PAC unit as instructed. But come to find out, this Atoto head unit has a built-in SWC Key program function, meaning that in the case your vehicle uses analog steering wheel controls, you can directly connect the head unit's SWC-Key wire to the respective wire leading to your steering wheel. The PAC unit in my installation was totally unnecessary. Basically, I had to first program the PAC unit with my Jeep's steering wheel button signals, and then program the Atoto to map the signals from the PAC to the respective functions. I later installed a second Atoto F7G2A7WE unit into a 2007 Honda Pilot and skipped the use of the PAC unit, instead direct connecting the head unit's SWC-KEY wire to the respective wire for the analog steering wheel controls. I was able to program the head unit to directly interpret the signals without the need for the interface adapter... So before you buy this, look up the aftermarket head unit you are buying as well as the vehicle you are installing this in to see if (1) your head unit has the option to be programmed to recognize your vehicle's steering wheel controls and (2) if your vehicle sends steering wheel button commands to the radio via an analog resistive dropper circuit, or by a digital signal. If your vehicle uses a digital signal such as CAN-BUS and you cannot easily tap into an analog signal wire for the buttons in the steering column, then use of the PAC adapter would be necessary to convert the signals back to analog to interface with the head unit.TLDR - This is a decent product, however you might not actually need this if your vehicle uses an analog steering wheel interface signal and the head unit has built-in mapping/programming to map your buttons to the radio functions, such as with my Atoto head unit.