[T3] Small red wire ???

[Daniel K. Du Vall]

Thanks Jim I knew some one out there might have some idea as to what this was. I am looking at maybe a tach down the road, now that I have the MS I have many options on how to hook it up. The extra wire will make it nice for one of the options. 

Daniel Du Vall
http://1peter4-10.org
http://volkswageninsanity.us

-----Original Message-----
From: type3-vwtype3.org-bounces at lists.vwtype3.org [mailto:type3-vwtype3.org-bounces at lists.vwtype3.org] On Behalf Of Jim Adney
Sent: Sunday, March 17, 2013 7:57 PM
To: type3 at vwtype3.org
Subject: Re: [T3] Small red wire ???

On 17 Mar 2013 at 23:32, Daniel K. Du Vall wrote:

> OK I have looked in the wire diagram in the Bentley and am down to one 
> small red wire that runs from(I assume) the dash area to the engine 
> compartment its not hot with or without the key on and am totally 
> clueless what it is or what it might have been for. It's the lone wire 
> after removing all the leftovers of the original FI system butcher job 
> the last owner did. I am bundling wires and just don't want to forget 
> something. I might just leave it there as never hurts to have a dead 
> wire that might come in handy some day. But my curiosity is getting to 
> me ;-)

Starting in '70, the wiring harnesses all contained one extra red wire that was only used on FI cars that got an AT. That wire starts at the fuel pump relay and ends with the oil pressure switch wire. 
You can usually see it, cut off inside the sleeve that the OP wire emerges from. It was cut off on all factory MT cars, but it's a nice wire for the addition of a tach, if that's in your plans.

Starting in '70, AT FI cars got an electrically heated AAR. That wire supplied the power at the same time that the fuel pump got energized.

--
*******************************
Jim Adney, jadney at vwtype3.org
Madison, Wisconsin, USA
*******************************

_______________________________________________
VWType3.Org mailing list - type3 at vwtype3.org http://lists.vwtype3.org/listinfo.cgi/type3-vwtype3.org
Contact gregm at vwtype3.org if you need help with the list.