Hi,

I did GoWesty's auxiliary battery installation on my '85 Westy.  The stuff
that is powered by the aux. battery seems to work ok (at least the stuff I
tested, including the clock and the light by the driver side door.  When I
buttoned it all up and went for a drive, the wipers didn't work.  Then I
noticed that the blower fan was not working.

Bentley 97.66 shows both of those downstream from a relay ("defog cut out
relay (x-cntct)"), which I checked and appears to be working, and a fuse
(S10) which I don't think is blown (visual, continuity, voltage at both
ends).

More information (since I don't know what might be relevant--I am a newbie
at this):

Wiper delay quit working a couple months ago in the middle of a drive in the
rain, but the wipers still worked.

On the same trip (don't remember the sequence), the rear window defrost
switch (also downstream of the same relay, btw) went back behind the panel
when I tried to turn it on one time.  It's still back there.

A couple of times (once on that trip) I have had it have a hard time
starting when starting after several hours of driving then stopping to pump
gas.  Then the most recent time, it wouldn't start at all after about a ten
minute drive.  I let it sit an hour and it started fine.  That (as well as
the trip mentioned above) was before the aux battery installation.  Negative
starter battery post to frame is 1.6 ohms (measured because I read something
about a poor grounding causing that kind of thing)

It's 26 degrees Fahrenheit today.  The voltage across the posts of the
starter battery was 12.18 cold.  Immediately after I started it, while it
was running, it measured 11.51 volts..

To make sure the relay switch mentioned above was closing, I tested at the
87 connection while running, 10.89 volts.

Downstream of the S10 fuse, 10.67 volts while running.

What should I check next?

mike