Date: Tue, 16 Jun 2009 06:13:25 -0700
Reply-To: mark drillock <mdrillock@COX.NET>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: mark drillock <mdrillock@COX.NET>
Subject: Re: Help with Dometic 12v wiring
In-Reply-To: <22121281.1245125239143.JavaMail.root@elwamui-rubis.atl.sa.earthlink.net>
Content-Type: text/plain; charset=UTF-8; format=flowed
You need to make sure the alternator part of the circuit is working
correctly first, then connect the relay to it.
With the blue wire not connected to the relay, make sure the dash alt
led comes on when the key is turned on and then goes out when the engine
is running.
If the alt led behaves as it should, connect the blue wire back to the
relay, pin 86. Pin 85 should be connected to ground. With the engine
running and the alt led off, touching the blue wire to pin 86 of the
relay should make the relay click, every time. If not, the ground is
missing from pin 85 or the relay may be bad, or the blue wire is not
connected to the alt led circuit anymore.
You must verify that the dash alt led is behaving as it should since
that signal is what controls the relay. Then the blue wire should
provide +12v to the pin 86 of the relay.
Mark
Rick Foster wrote:
> Being new to posting on this list and my computer doing funky things at times I know not if at times my follow-up post's didn't make it here, I've been waiting for replies, so I venture again: (thanx Craig, robert, Mark and Scott)
>
> This thread took the direction of 'The Incredible Journey' thru my relay. Facinating, and possibly why my relay is fried, the input wiring (thanx Robert) was wrong. I'm still stumped about how to know my house wiring is OK before installing the Dometic!
>
> - I checked output at my Alt blue wire spade while running and got 0.12v. My alt lite goes on when I turn ign on but get no voltage from the relay at that spade on the relay.
>
> -? my relay is fried? It is VW # 411915511B.
>
> - ? GW has a 'second battery relay' that has the same spade #'s; is this the same relay?
>
> - ? Do I need a new Alt?
>
> - ? Should I get a 'aux bat wiring kit'?
>
> Thanx, and count me in too!
>
> (Freebo, Dometic Harmony is the Goal!)
>
> Rick Foster
> '85 Westy, 2.1
> So. OR
>
>
>
>
>
>
>
>
>> Sent: Tuesday, June 09, 2009 3:48 PM
>> Subject: Re: Help with 12v Dometic wiring
>>
>>
>>> No, the wire that seems to come from the ignition switch is really a
>>> ground wire of sorts, through the starter motor coil. The voltage that
>>> triggers the relay comes in on the blue wire, from the alternator. If
>>> you have something other than a Bosch alternator the blue wire may not
>>> work anymore.
>>>
>>> Mark
>>>
>>> Rick Foster wrote:
>>>> 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!
>
>
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