Chrysler Repair: 98 Concorde blower motor runs all the time, concorde lxi, fuse block

Question
I have 98 Concorde lxi 3.2 liter v6 it has automatic temp control. The blower motor runs at high speed all the time. every thing else seems to work fine.

Answer
Hi Sheldon,
I had virtually the same question a day ago. Here is how I responded:
"The blower motor's 'power module' is fed one of 14 different voltage levels and an 'off' signal via the body computer (which is under the dash on the driver's side and is the back half of the fuse block, at that location). Now either the body computer is not sending the control signals to the power module or the power module has failed in the high "run" position. The power module is on the lower right side of the HVAC air distribution box under the dash midline of the body. Remove the underdash pad on the right side to get a better view. By sound or vibration you should find the blower motor and its two wires which are plugged into the power module nearby. That power module can be removed and replaced with a new one. But check out its price first. I suspect though that it is much less expensive than the body module (I hear $900) so it would be worth trying that. There is a red/light green wire from the power module to pin 6 of the 24-pin black plug on the body control module (this would be on the back side of the fuse box) You could test that wire from the power module to the body module for whether it is patent using an ohmmeter or a continuity tester. Also the wire passes thru an 8-pin disconnect located to the left of the HVAC housing which you could trace by following the wire to see if it might have been disconnected by someone's foot kicking the wires on either side and thus dislodging the two halves. If that all checks out, then my inclination would be to buy a new blower power module to see if you can regain control of the blower motor."
The blower motor module is also a solid state device, but is much less expensive that a new body computer. It might be possible to test for failure of the control signal by using a diagnostic readout box at a Chrysler dealer, but that diagnostic test might cost just as much as a new blower motor module so why not just replace it?
Roland