At 12:35 PM 1/21/2005, you wrote:
>The blue (or white) wire is the relay trigger wire for the fridge when it is
>on DC power.  It will trigger the relay so that power to the fridge when on
>DC is only provided when the engine is running.  This is used when you only
>have a start battery and no aux battery and you don�t want to have a dead
>battery out in the boondocks.
>jimt

This is true, but I will add this:  If you do have an aux battery, and most 
Westys do, (or they have provision for one...)  When the signal closes the 
relay, it connects the 2 batteries together.  So that when the engine is 
running it charges both batteries, when not running, they are separate.

Edward