Radio Wiring Harness - Sprinter-Forum I know this thread is ancient, but it's still 3rd Google result for 2006 Sprinter radio wiring harness. The Front Right polarity is reversed in the main post. I'm not a big time stereo buff, but 3 radio presets and a crappy cassette deck for a head unit in a $40,000 truck is silly. When I bought my van, Sprinter Van Stereo Upgrade - YouTube Click to view on Bing13:54Sprinter Van Stereo Upgrade DIY Sprinter Van. Loading.. Unsubscribe from DIY Sprinter Van? Car Stereo Wiring Harnesses & Interfaces Explained - What Do The Wire Colors Mean?Author: DIY Sprinter VanViews: 67K 2005 Dodge Sprinter | Stereo Wiring Diagram 2005 Dodge Sprinter Stereo Wiring Information. Radio Battery Constant 12v+ Wire: Red/Yellow Radio Accessory Switched 12v+ Wire: Black/Red The stereo wiring diagram listed above is provided “as is” without any kind of warranty. Use of the information above is at your own risk. Leave a Reply.