temp control 89 5th ave

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  1. Mr Volare Imperial

    Mr Volare Imperial Well-Known Member

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    mmm! Getting closer... isn't there a listing of the electrical connector part-numbers in the wiring diagram sections of the body manuals? Seems like I remember seeing that somewhere.

    For my car, it's a trouble with the connector. My door motor works fine when the connector moves slightly, and the top tab of the pinch-together set of tabs that releases the connector from the servo is broken off altogether now. Thanks for the files.
     
  2. BudW

    BudW Well-Known Member

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    The only place I recall seeing part numbers is either on TSB’s (which I don’t see any for this system) or in the Parts book (below link).
    The problem with Parts book is it is not specific as to what each item is for and only the popular connectors are still available (about 2/3rds of the parts have not been available, from Chrysler, for a long time.

    Also see https://www.forfmjbodiesonly.com/classicmopar/threads/1984-electrical-connectors-pins-bulb-sockets-part-numbers-and-so-forth.6642/
    BudW
     
  3. Mr Volare Imperial

    Mr Volare Imperial Well-Known Member

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    Man, that's a noisy little servo. Got mine working, thank you to all who've posted pics and descriptions, made short work of it.

    I could not tell exactly what the problem was, however.I had the typical 'temp lever won't go all the way to the right... the temp sliding switch inside had developed some dirt or something stuck on the track it slides on. I used brake parts cleaner and then some white lithium spray grease to get smoother action out of it. It works well now, without that mechanical resistance at the "85" end. So this is one component that could have been at fault, tho I doubt it. The actual sliding switch slid to cold without working the blend air servo either.

    Next was the connector. The top clip of the two pinch-together clips broke off my connector. I zip tied it around the rear securing post on the servo. This could have been the fault point, one connector tang-tab had a lot of burnt carbon deposits on it. I bent down the connector tabs to ensure contact.

    The blend air door moved without resistance.

    I removed the servo box, it's just one bolt at the front and a twist fit for the securing post at the back. Wait.. let me pause to marvel at Chrysler's ease of access and simplicity of repair. ....
    ok... I removed the servo's top piece once it was off the HVAC box, and spun the little motor, it got the gears moving and all looked well. I reassembled it and it worked. Slowly rotating the blend air door as needed precisely to the positioning of the temperature control lever..... grrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr and back to warm ...grrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr and a little cooler now.. grrrrrrrrrrrrrrrrrrr

    Next step, vacuum side of things... Or... this red vacuum hose.. why is this one red? Where did it connect to? Why is it hanging out of the vacuum connector all alone? Does it have an end? ...more to come.
     
    Last edited: Aug 14, 2017
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  4. MoparKidD-4

    MoparKidD-4 Well-Known Member

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    This is good to know for the future in case the ATC in my '88 Fifth Ave does the same thing. Although I think that will be a while, it works flawlessly now and doesn't make any noise either like you describe. In fact I was shocked at how silent and responsive the whole system works when I first got the car, it's truly the first type of climate controlled car I've driven that is possible to get the PERFECT temperature coming out the vents that doesn't fluctuate constantly simply by adjusting the temp lever. Man I miss analog controls in cars...
     
  5. Mr Volare Imperial

    Mr Volare Imperial Well-Known Member

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    Like the sand through an hourglass, its just a matter of time :)

    My 5A had a hard life, it spent most of its life in Los Angeles, and from what I can see it must have been an outdoor existence. The top tab of the pinch-together connector socket to the servo was the one that broke off, the tab that sits closest to the top of the dash panel top was evidently more brittle than the one slightly more protected on the underside.
    I suspect this car sat in the sun a lot and this probably aged the servo more-so. The top of the vinyl roof is also especially aged.

    Next up, installing 1/8'' rubber tubing inplace of the vacuum hose assembly. I should check my check valves, too. My buttons no longer move the air to the right places.... it was fine before I started fixing the servo, I imagine my moving stuff around broke the plastic manifold assembly the 7 hoses fit into. Fix one thing, break 2 :)
     
  6. Mr Volare Imperial

    Mr Volare Imperial Well-Known Member

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    The integrated circuit board has limited value in an automobile, contrary to popular belief :)

    I like how the Spark Control unit picks up the ultimate timing point and how its related to how fast the gas pedal was mashed to the floor. And Delco's Twilight Sentinel automatic lighting. Aside from those two major advances in motoring comfort and safety, to me the IC, digitized function design is pointless in a Chrysler. Instead, all these 10-20 year old $300 inoperable FWD Chryslers have become failure prone with these body control computers, etc. It's automotive technology regression, the computer :)
     
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  7. MoparKidD-4

    MoparKidD-4 Well-Known Member

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    I'd say Electronic Fuel Injection is a good one too... not much besides that.