I have to say that I suspect Mark Drillock has done and posted this  
mod, but I can't recall. Anyhow, probably like a lot of you Vanagon  
Westy owners, I have been powering my interior lights, radio, and cig.  
lighter from my auxiliary battery by running a (fused) wire up and  
into the bottom contact of the #3 fuse spot (fuse removed) on panel.  
This works ok, but its sort of a kludge. I looked at the wiring  
diagram and noticed that there is a spare connection on “E”  
multiprong connector, “E3″, that goes directly to the circuit that  
fuse #3 powers. I have a bunch of scavenged wire pigtails that have  
the molex-type connecter on one end. Connect one of those pigtails to  
the aux. battery wire, and pop the other end into “E3″. Fuse spot  
#3 is left without fuse as before.

alistair