Re: A/C load compensation?

[Dave Head <dhead@sundial.net>]

At 04:51 PM 9/10/97 +1000, you wrote:
>Dave I'm begining to worry about you, The Navy is supposed to degrade
>ones brain not enhance it, just kidding. I'm looking at the wiring diagram from
>the A/C control unit and I can't see any wire labeled referencing the after run
>relay
>unless it is labled as something else. Here's a list of the wires bentley has
>labeled
>
>1. Fresh air fan
>2. Fresh air fan control unit
>3. A/C high pressure cut off
>4. Engine coolant temp sensor
>5. outside temp sensor
>6. A/C kick down sw
>7. inside air temp sensor 1 fan
>8. inside air temp 1 sensor
>9. ambient temp sensor
>10. inside air temps sensor 2 temp regulator flap motor
>11. A/C refrigerant low pressure se
>12. A/C comp clutch
>13. A/C thermoswitch


If yours is the same as mine, pin 23 in current track 367 (AC control head)
is a red/white wire that goes to  current track 97 (After run relay, pin 3).
Coming off that connection, angling over to current track 96, the red/white
wire goes to current track 81 - pin 6/ka of ye olde Idle stabilized module.
I believe this is the signal from the AC head that provides 1) Low speed fan
operation, and 2) Idle speed increase. 
The reason this is so clear is my attempt to figure a way to use these
signals in a conventional relay setting to get rid of the after run relay -
but I didn't want to overload the signal with excessive current draw,
meaning a FET control system. This make my head ache enough that when Shokan
offered me a used relay fer $50.00, I gave in. Project on the back shelf
until relay goes south. What I _should_ do is buy a spare from GPR - can't
beat that price!


>after run relay which does work by the way. I'll keep pickin at it. I forgot to
>mention I fixed my hesitating startup, I put the new fuel pump in and
Vroom!!! on
>the
>first or second crank, the only problem is it stalls if I don't keep my foot on
>the peddle. It appears I'm having choke problems, I'm trying to get a new
throttle
>
>switch but my parts place is having a hard time trying to locate the part, they
>told
>me that the Audi dealer they called said that the switch is not sold seperatley
>but with
>a new throttle body. I'm going to call Linda and see what she can do for
me, right

I believe Linda's price is 68.00. There's a thermoswitch in there somewhere
controlling the warmup regulator also, I think...

>now I have the switch disconnected this way it  doesn't bog and choke on
me, but
>it still stalls when 1st start up, when  warm she purrrrs like a kitten. Oh one
>more thing
>the bolt on the P/S pump that secures the line to the bomb went out on me, oil
>everywhere, the threads on the bolt were stripped, I wonder how that happened?
>Oh well nothing like driving a 200 without power steering. I have my E-6 exam
>

Watch it!  That also supplies brake pressure... I don't need 20V parts THAT
bad...
********************************AUDI FAN***********************************
                                   EMCM(SW) Dave Head  
87 5KCStq 205K miles                1.7 bar 
    qcusa #3442                 Maitland, Florida   
******************************************************************************