I don't think this can be retrofitted to an older RV. Well, not without completely rewiring the RV. Here's a quote from the Lippert web site:
Quote:
Hard wired CAN connection to RV controllers
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I think this implies that all of the elements to be monitored and controlled are also connected to an RV CAN bus. Here's a link to a Wikipedia entry about CAN bus:
https://en.wikipedia.org/wiki/CAN_bus
I'm not sure how this all works - whether the RV CAN bus is connected to the chassis ODB system, etc. - but I'm pretty sure everything being monitored and controlled has to have a digital interface to the bus.
Dave