Date: Sun, 26 Feb 2006 13:28:21 -0800
Reply-To: mark drillock <drillock@EARTHLINK.NET>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: mark drillock <drillock@EARTHLINK.NET>
Subject: Re: anyone added a tach/digi clock cluster to a '85 Non-GL or
Transporter????
In-Reply-To: <e4.7ac09f56.313369d2@aol.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
There are some errors in what Eric's list gives but since he prolly had
a Subaru conversion some of it is explained.
The green you are finding may come from the oil pressure switch, though
the wiring diagram shows blue/black all the way it could be in error.
What color do you see at the switch? You can easily trace the engine
compartment wiring to the dash 14 pin connector with an ohm meter to
verify that a wire in the rear connects to something up there.
In any case, with only one green wire at the coil, you don't have
complete factory tach wiring. The dash IC wiring with the green is a sub
harness. The IC green and a few others go to a 4 pin connector up front.
VW could have used the sub harness for a tach model but matched it to a
main harness without a tach wire. I'd like to think that all 85 main
harnesses were the same but who knows.
Mark
JordanVw@aol.com wrote:
> mark.. the T7A tound connector plug in the firewall junction box is
> wired as this on my '85 Doublecab:
>
> T7a 1 blue/black - goes into GREEN?????
> T7a 2 yellow/red - goes into yellow/red
> T7a 3 blue/green - goes into blue/green
> T7a 4 brown - - - - -goes into brown
> T7a 5 EMPTY
> T7a 6 red/black - goes into red/black
> T7a 7 EMPTY
>
>
> Eric Dieder (sp?) said that:
>
> T7a-1 blu/blk is the oil pressure
> T7a-2 yel/red is the coolant temp
> T7a-3 blk/grn is the coolant temp (+)
> T7a-4 brown is the coolant temp ground
> T7a-5 green is the Tachometer
> T7a-6 red/blk is the starter
> T7a-7 yel/red is check engine light
>
> so apparently pin T7a 5, which is the tach pin, is empty on my doka.
> what id like to know, is why T7a 1 (which apparently is the low bar
> oil PSI) goes from blue/black wire into solid GREEN???
>
> and also, why would i have the correct green tach wire in position #9
> of the 14pt multiconnector inst. cluster plug in the dash, and then
> have it terminate into nothingness somewhere between there and the
> engine compartment?? i just find it odd that the wire was already
> there in the plug, but nowhere to be found back by the engine. so i
> guess i just remove the green wire from #9 and add another green wire,
> or splice into the existing green wire? id just like to know where
> that wire goes.. because its obviously in the harness somewhere..
> eric had a '85 doka and so did stacy - they both said they had to add
> a wire to #9 pin on the cluster plug.. i guess my doka has a "one
> off" wiring harness? strange stuff..??
>
>
> chris
> In a message dated 2/26/06 1:22:40 PM Eastern Standard Time,
> drillock@EARTHLINK.NET writes:
>
>
>> The only solid green wire inside the wiring box would be for the tach
>> signal. I'd guess you are seeing the blue/green wires for the coolant
>> level switch. What colors are the wires on either side of the one you
>> saw as green? VW used the same basic pins and colors for all the
>> Vanagons so if you have a later one to look at you can see where the
>> green wire should be on the round 7 pin.
>>
>> Mark
>>
>> JordanVw@AOL.COM wrote:
>>
>> >hi mark... the 2 prong plug that goes to the upper tabs on the coil
>> only has
>> >the one fatter green wire going to it.. the other plug has no wire
>> (where the
>> >smaller green tach wire would normally be)
>> >in the wiring junction box on the firewall there are the 2 round 7 pin
>> >connectors.. one connector plug has a small green wire going to it,
>> but the joining
>> >plug that plugs into it has a blue wire mating up to it on the
>> matching pin
>> >of the connecting plug....??
>> >
>> >so why would VW build a wiring harness with the green tach wire in
>> position
>> >#9 of the 14pt plug into the cluster, and then have the wire go nowhere?
>> >where does the green wire go? is the small green wire i see in the
>> round 7pt plug
>> >in the junction box that connects with the blue wire, the tach wire?
>> >
>> >any ideas?
>> >
>> >chris
>> >
>> >In a message dated 2/25/06 1:07:14 PM Eastern Standard Time,
>> >drillock@EARTHLINK.NET writes:
>> >
>> >
>> >
>> >
>> >>Look at your coil. Does it have 2 green wires to it, one larger one
>> >>smaller? If not, you will need to add one. If not, how about in the
>> >>wiring box, with the 2 round connectors? The tach smaller green wire
>> >>from the coil goes to one of the round 7 pin connectors. Is there a
>> >>green wire to one of the round connectors and if so is it connected on
>> >>both sides of the connector?
>> >>
>> >>Mark
>> >>
>> >>
>
>
>
| 
