The 83-85 vans with power steering or AC get one valve, PS and AC get two.
12 volt + goes to one side of the valve coil and switch on the PS pressure
hose completes the circuit to the chassis, (engine case).

Dennis

>From: --------------------- <VW4X4@VERIZON.NET>
>Reply-To: --------------------- <VW4X4@VERIZON.NET>
>To: vanagon@GERRY.VANAGON.COM
>Subject: Re: Turning kills engine--??
>Date: Fri, 11 May 2007 13:25:28 -0400
>
>This switch is only there to increse the idle when the PS drags the
>engine speed down.  If you are not seeing this problem don't
>worry about it.
>   The Digijet fuel system has no way of adjusting the idle.  When this
>is required VW used a throattle bypass valve.  You will see these valves
>on 84- 85 vanagons  with air.
>                                Joe. W
>
>Geza Polony wrote:
>
>>Anybody know how the power steering pressure switch is wired in an '84
>>1.9?
>>
>>No mention of it in the Bentley. The wiring diagrams only start to show
>>this
>>switch with the Digifant.
>>
>>I just replaced the wiring harness and am thinking I didn't reconnect the
>>ps
>>pressure switch. Other than that, van runs great.
>>
>>
>>
>>