The wire from the temp switch on the fins is the hot wire.

One thing to be aware of is that VW did not include a vehicle chassis
ground wiring connection for the Dometic fridge case metal in the fridge
wiring. It is isolated from the vehicle metal and thus can't be
reliably  used for measuring voltages or for a current return path. In
the stock Westy the metal propane line acts as a chassis ground wire for
the fridge. People doing testing with the fridge out and people doing
custom installations should add a discrete ground wire from the fridge
case metal to battery negative wiring. Not doing so will also keep the
pilot led from working.

Mark

Mike Miller wrote:

>Hi all,
>
>I'm putting a Westy interior in a country homes van.
>
>Regarding the Dometic: Does anyone know which way the wires should go to the
>fan to have it push air up through the fins?
>
>That is, which wire is hot side? The wire from the sensor on the fins or the
>other one?
>
>TIA
>
>Mike
>
>
>
>