[Vwdiesel] A/C wiring question (High pressure switch 82 pickup)

[Erik Lane]

Thank you Ken, I will look there. Although if that's where it is then
I don't NEED to since the A/C components stayed connected to the car,
with the exception of the compressor. It was more out of curiosity,
and now I will definitely look there to see if mine has it. I would
think it would have to have it to work right...

Thanks!
Erik

On Thu, Sep 4, 2008 at 6:09 AM, ken1 <ktzkarz at embarqmail.com> wrote:
> Erik:
> I found my high pressure switch on the small line between the drier and the firewall. The wiring interrupts the power source before it gets to the compressor.
> ----- Original Message -----
> From: Erik Lane <eriklane at gmail.com>
> To: vwdiesel at audifans.com
> Sent: Thu, 4 Sep 2008 01:35:43 -0400 (EDT)
> Subject: Re: [Vwdiesel] A/C wiring question
>
> Yes, I saw that switch on the head and now I feel really silly. I
> looked at it and figured that it was an aftermarket temp sender that
> came from the donor car and didn't even consider it. I figured that
> the thermo switch would be in the A/C circuit to act something like a
> high pressure switch, which is more common in an A/C system. I was an
> A/C mechanic for a while for large systems, so I know something about
> how it's all supposed to work, but couldn't find a pressure switch on
> this system. Is there one somewhere else? (Though I didn't stick with
> it long enough to reach journeyman level, so I'm no expert at these
> things!!)
>
> On mine there's only the thermoswitch, no other temperature sender, I
> believe. But I'm not looking at the car right now so I can't swear to
> that. My car has two temperature sensors on the end of the head. The
> color of the wires are both light green, so I'm sure that it's that
> big thing on the head.
>
> Guess that will teach me to overlook the BIG obvious thing right in
> front of my face!
>
> Thanks for the help, guys!
> Erik
>
> On Wed, Sep 3, 2008 at 10:12 PM,  <LBaird119 at aol.com> wrote:
>> In a message dated 9/3/2008 8:31:36 PM Pacific Daylight Time,
>> ktzkarz at embarqmail.com writes:
>>
>>> There should be a water inlet/outlet on the head that faces the radiator.
>>> In that inlet/outlet there is usually a thermoswitch with two (2) male prongs,
>>> as well as another temperature sender. That location is near the middle of
>>> the head, between cylinders #3 &#4.
>>>
>>
>>  I believe that one has two green wires. It's a big knob of a thing
>> and simply interrupts one of the wires going to the compressor in
>> the event that the engine get's too warm.
>>  GM's have a high temp/fuse on the high side near the compressor.
>> There's a thermal plug in the reciever/drier and high and low preessure
>> switches in the lines.  High side COULD be thermal instead of
>> pressure so I mention it in case.  Depends on where it is in the
>> wiring and the color of the wires.
>>    Loren
>>
>>
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