7 Way Plug Diagram. As you've discovered, the wire colors aren't always the same, but the pin locations need to match up for proper functionality. If that's the case, you'll need an adapter so that the two systems can connect.
Free wiring diagram and tutorial inside!
If that's the case, you'll need an adapter so that the two systems can connect.
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The manufacturer provides a wiring diagram - Which bears little resemblance to reality. However, we don't think they're really meant for a "true" van electrical system, because they have far too many. The plug I bought had yellow as the center aux color.