Power steering was optional for 84,
but the 84 harness doesn't have the connection for the PS pressure switch,
or for a vacuum switching valve for upping the idle speed when PS pressure
is high.   so basically.........nothing to worry about there.
Even if his 84 has PS , which I don't think it does anyway..
he could run PS just fine without the PS pressure switch input to the ECU
........just like 84's with PS do.
Scott
www.turbovans.com

----- Original Message -----
From: "David Beierl" <dbeierl@ATTGLOBAL.NET>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Monday, April 06, 2009 5:44 PM
Subject: Re: 84 vs 85 Digijet

> At 10:13 PM 4/6/2009, Ian Allan wrote:
>>harness. Until to day I thought that there was only Digijet and
>>Digifant. Little did I know that 85 Digijet differs from 84 Digijet.
>
> I think it's fair to say they don't differ much.  The most obvious
> thing that springs to mind is that some '85s used the new-type
> closed-throttle/WOT single switch instead of the previous double
> switch.  Electrically they're identical, so if an earlier throttle
> body isn't ready to hand you can adapt the harness connectors to work
> with the new one.
>
> I don't think '84s had power steering, so that shouldn't be an issue.
>
> If other folks don't have more specific answers, I'd copy 97.54
> through 97.66 and superimpose them in front of a strong light,
> looking for differences.  I'd begin by comparing 97.54 and its
> counterpart, looking for differences in the current track numbers;
> noting differences for special attention.  Likewise the connectors
> and ground points.
>
> Then superimpose the actual circuits, and investigate any place they
> don't overlap exactly.  Both diagrams have 105 current tracks, a hopeful
> sign.
>
>
>  --
> David Beierl - Providence RI USA -- http://pws.prserv.net/synergy/Vanagon/
> '89 Po' White Star "Scamp"