Date: Fri, 2 Oct 2009 11:26:09 -0700
Reply-To: Scott Daniel - Turbovans <scottdaniel@TURBOVANS.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Scott Daniel - Turbovans <scottdaniel@TURBOVANS.COM>
Subject: Re: Found my instrument cluster..now a ?
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Hi,
yes, the tach single comes from terminal 1 on the coil.
if there is a green wire already there ( later vans usually ) - it's for the
tach.
fwiw -
'history' I guess you could call it.
in the days of points, the negative terminal ( terminal 1 on VW's ) went to
the points wire.
It's where you'd measure dwell with a dwell meter on a points car.
And as soon as there were electric, or electronic tachs.........that's where
they got their tach single from.
Starting in the 50's even.
In electronic igntion ......like we use on Vanagons .........that's where
they get they tach signal- the 'negative' or 1 on the coil.
scott
www.turbovans.com
----- Original Message -----
From: "Don Hanson" <dhanson928@GMAIL.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Friday, October 02, 2009 8:00 AM
Subject: Re: Found my instrument cluster..now a ?
> Thank you, I think I recall the coil as the source for a good tach
> signal.
> Since no other replies, I'll try the archive-search, which in the past
> I've
> never been able to get an answer from...surely my mistake or ignorance
> about
> how to format the search, but...
> Don Hanson
>
> On Fri, Oct 2, 2009 at 5:20 AM, T Collins <tonycollin@gmail.com> wrote:
>
>> someone correct me if I am wrong, but I believe that the signal you are
>> looking for comes from one of the leads in the coil. That would make
>> sense
>> as this is consistent with the turning of the distributor.
>>
>> Also, something that I am not sure about but would suggest: When making
>> your test wires for the tach, place a fuse in line or you could fry your
>> cluster foil and the like.
>>
>> I hope this helps in some matter even if it is for someone sto say that I
>> am far of the mark. I know that in my Scirocco the tach signal comes from
>> the coil and it used CIS for fueling.
>>
>> Later,
>> el t.
>>
>> On Fri, Oct 2, 2009 at 12:47 AM, Don Hanson
>> <dhanson928@gmail.com>wrote:
>>
>>> Last week I was looking for a working odometer. Found one on the Samba
>>> and
>>> got the whole cluster. I also have a working tach from a diesel van
>>> that
>>> I'd like to get into the new cluster rather than the analog clock...My
>>> current one with the broken odo also has a clunky clock...
>>> I think I can figure out how to make the water temp and the fuel guage
>>> work, the one in the tach face..Hopefully. I have somewhere a reference
>>> about which pins in the plug work for those...but looking at the foils I
>>> have around, I see I can actually follow the leads back to the plug and
>>> get
>>> stuff working that way.
>>> But, where is a good place to take a signal for the tach? Is there a
>>> rpm-based signal anywhere up front or do I need to go back to the coil
>>> or
>>> the alternator or the distributor and run a wire all the way up to the
>>> tach
>>> from the engine? Mine is an inline four, but the alternator, coil and
>>> the
>>> distributor are the same as a WBX. It has a Digifant II injection
>>> system.
>>> Anybody know? I'd first like to test the tach using a test wire lead
>>> first, to make sure I get good response before I bother trying to make
>>> the
>>> other two "in Tach" gauges operable.. The only downside is the tach I
>>> have
>>> only goes to 6k and my motor may rev a bit higher sometimes. sounds like
>>> it
>>> maybe..I see no upper limit pin on the tach face, so I am hoping I can
>>> go
>>> a
>>> little past 6k without breaking the tach...Not that I drive there ever,
>>> but
>>> I have been known to wind the little inline up to keep up with traffic
>>> at
>>> times.
>>> Don Hanson
>>>
>>
>>
>>
>> --
>> 82 Scirocco "Rodolfo"
>> 85 Vanagon "El Guapo"
>> 90 Fuji Ace
>>
| 
