Fridge relay terminals : 85 is ground (negative), 86 is positive key-on power, 30 is battery always hot, and 87 is load. 

86 connects to the blue alternator wire under the dash. 

Robert
1982 Westfalia

--- On Tue, 6/9/09, Rick Foster <redhawkf@PEOPLEPC.COM> wrote:

> From: Rick Foster <redhawkf@PEOPLEPC.COM>
> Subject: Help with 12v Dometic wiring
> To: vanagon@GERRY.VANAGON.COM
> Date: Tuesday, June 9, 2009, 3:41 PM
>  Thanx Craig for your reply.�
> Maybe I was bit hazy in my problem.� I'm good about the
> Dometic's operation, and it is all good when I bench tested
> in the garage.� I'm ready to reinstall and was checking
> the 12v wiring in the van and found the problem I
> described.� I checked all the circuits with the a)
> ingnition off, b) ignition on, and c) with the engine
> running. I don't have power to the relay accept from Bat at
> term 87.� Is this supposed to this way?� Seems
> like there ought to be power to the #12 wire coming into
> term 85 which connects to the ignition switch.� Hope
> that helps to de-fog my delema.� Thanx for any help!
> 
> Rick Foster
> 85 westy
> "Cassidy"
> 
> 
> 
>  Now I'm stumped and stymied with getting back on the road
> with my Dometic working.� It never has, but with help
> of Lorean and Ken, I took it out, refurbished it, bench
> tested each system and it worked. Before putting it in, I
> tested the 12v input and here's what I've got:
> 
> � 1- no auxillary battery, just stock wiring
> to'refrigerator heater relay'(bently 97.32.e), plan to put
> in aux bat in future.
> 
> � 2- clean wiring from relay thru fuse block and to
> ignition switch.
> 
> � 3- + Power from bat at term 87 thru term 30 to frig
> connection.
> 
> � 4- continuity in blue wire from term 87 to D
> connection at the
> � � � alternator.
> 
> � 5- No Power at term 85 from the ignition switch but
> + continuity thru this wire to the ingnition terminal (term
> 50).� This term is coupled with a #10 wire that goes I
> know not where. Bently (97.62) looks like it's track 78, but
> it looks like it goes off where 'no man has been before'! I
> can't read any 'track 78' anything functional and I'm not
> spark engineer. Spock where you!
> 
> Date:� � Mon, 8 Jun 2009 22:58:36 -0700
> From:� � craig cowan <phishman068@GMAIL.COM>
> Subject: Re: problem with 12v power to dometic frig- long
> 
> The first thing to keep in mind is that the fridge on 12v
> only works while
> the engine is running, and takes quite some time to "warm
> up". If you have
> the fridge completely off and turn it onto 12 v and drive
> for 2+ hours,
> you'll feel the fins getting cold. If you just drove around
> town....i
> wouldn't expect much of anything. The 12v selection is
> really just to keep
> things cold while driving
> 
> 
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