Chrysler Repair: Heater Fan on Full, 1997 chrysler lhs, chrysler lhs

Question
Roland,

I can see two actuators, and one is definitely not affecting the fan, but it also has 5 wires and none match the color scheme you gave.  I cannot even see the wires to the other actuator without dismantling the dashboard.

While I posted the question to you, I also found an email on one of your postings for Ean in Canada.  He deferred to his father who believes it is in a blower motor resister (Chrysler parts shop seems to concur).  Unfortunately it is behind the glovebox so there is some major surgery to do before I can get there.  I found a link to disassembly of an Intrepid that looks like mine.  http://www.dodgeintrepid.net/forums/showthread.php?t=36926

Thanks for your help.
Don

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Followup To
Question -
I have a 1997 Chrysler LHS.  The interior heat/air fan is on full blast and cannot be turned lower or off.  I was told by a repairman it was the control panel on the dash which has the digital temperature readout, 10 buttons, two dials.  This is a $480 US part at the dealer.  I found and tried 4 from the junkyard ($40) and the problem was still there.  Sounds like it may be a hi-lo relay switch, but where would it be?  I'm not sure where the fan motor is, directly behind the glove box, or behind the console?  The fan is not accessible from under the hood.

Also, I have tried to take the plastic shields off under the dash and can't see how to do so without breaking those pop-in clips.  Got a hint?

Thanks!  
Don
Answer -
Hi Don,
I have only partial info on the A.T.C. system, from an earlier year's manual (89). But it may give you some direction. For the specific problem you have it says(quotation marks around the manual words, otherwise my additions)
"Select a one bar (slowest) setting of the fan blower
Disconnect the two wire male plug (green) from the power/ vacuum module (wire colors on the plug are black/tan and black)." BUT in the wiring diagrams for '92 which is the latest ones that I have showing the ATC system, the plug to remove is actually a four wire plug which also has a violet and light blue wire (color of plug not specified). Basically what you are doing here is disconnecting the control signal and ground for the fan motor, so if it keeps running it means that the black/tan wire is shorted to ground and thus by-passing the speed control function. "If the blower stops, then it is not shorted, and the problem is in the power vacuum module"(or it could be in the automatic temperature control switch, which has 21 pins, and which is probably part of the unit you already changed out to no avail).
"If the blower stays on high speed, the black/tan wire is shorted. If the blower stops, replace the power/vacuum module."
That p/v module is the large 5 sided box on the low-right side of the ATC unit. It is shown in the wiring diagrams as a black box (no internal wiring shown). But if you have found four vehicles in the yards, then you have a source of a replacement module. It is not the same as the control unit which the mechanic suggested changing out.
I hope this is of some help. You may not have to get to the blower motor if the p/v is the issue.
Sorry to say I don't have info on models post '92.  

Answer
Hi Don,
The only problem I have with the blower motor resistor block is that neither the '89 nor the '92 diagrams I have show there to be such a block when you have the ATC system. It is definitely used on the conventional heater system and it's shown on the diagrams. I therefor believe that the fan motor speed is controlled by a more modern voltage regulator, and I believe it is in the automatic temperature control power module (said to be located near the lower right dash panel in the '92 wiring diagrams) with the 4 pin plug I descrived to you (it may very well not be located in the large 5-sided box which I earlier described which was shown in the '89 manual; that is probably not a relevant suggestion for your '96).
I do see three black 5-wire connectors for various purposes in the '92 diagrams (using 4, 4, and 2 wires only) but those don't appear to have anything to do with the fan motor. I would suggest you look for a 4 wire plug with the colors I described in my earlier response:
The violet and the light blue wires come to it from pin 12 and 2 of the ATC control switch (12 being the blower module feed, and 2 being the blower signal {the speed signal no doubt}) and the other  being the black (ground) and black/ tan (line coming back from the blower motor which is controlled as to the current throughput by the automatic temperature control power module which I have no visual for but it probably is staring you in the face but you don't recognize it. See if you can trace the violet and the light blue wires from the ATC control switch directly to it. I'll bet that module is what is at fault.
Roland
P.S. When you solve this riddle let me know!