The small box allows you to use your factory steering wheel controls with your aftermarket radio. You will need to purchase a SWCL (Steering Wheel Control Lead) to activate this feature since some cars do not have steering wheel controls. (see below)
The smaller box reads the cars can-bus (data) wires. The following wires are transmitted to the factory radio through the can-bus wires. The small box converts the following wires into analog signals that your aftermarket radio can read. Red- switched power turns the radio on and off with the key and keeps the radio on until you pull the key out of the cylinder. Orange- Illumination wire dims radio when you turn on your lights. Mint Green- Parking brake wire unlocks security features when your parking brake is engaged. Purple with White Stripe- Backup camera reverse wire tells radio to Initiate back-up camera screen when you are in reverse. Pink- Vehicle Speed Sense wire tells the radio how fast you are going to improve accuracy especially when you lose GPS or cellular signal.
This harness is designed to connect directly into some radios that have an ISO conenctor with the standard ISO pinout. If your radio does not have an ISO connection we have a PNP converters that allows you to connect to your new radio without cutting any wires.
Not all the wires on the cars harness will be used.
Featured positive reviews:
Great product!10/07/2015 ByGreg Shuster I don't usually write reviews but had to speak up on this one. I purchased a competing steering wheel control from Scosche and wasn't able to get it to work. I replaced rewired and tripled checked everything and thought it must be something I did wrong. I have a Masters degree in electrical engineering! I finally replaced it with an Enfig kit and it worked immediately. I could have saved myself ten hours of troubleshooting if I spent a few more dollars up front on Enfig. Their installation kit really makes it easy!