QuestionQUESTION: My Chrysler LHS 1999 keeps over heating. I have replaced the fans, hoses, and thermostat. Also the Air/Heat blower motor will not turn off, and everytime I roll down the back passenger window on the drivers side the fuse blows, when the fuse blows the windows, lights, blinkers blower motor (air) stop working. Any ideas? Thank You! Laura
ANSWER: let me think about this, check the wiring diagrams and get back shortly
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QUESTION: Hi. I already checked all the wiring everything looks fine, nothing is burned or loose. I checked with the manual and nothing seems out of place. There is tinting on the back windows, I bought the car used and I'm not sure if its aftermarket; however, It wouldn't explain the overheating and blower motor not turning off.
ANSWER: I just responded to your first question, so look for that.
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QUESTION: Hi. It is a digital readout and auto temp control. I replaced the entire face plate, and controls on it.
AnswerHi Laura,
The reason that the blower motor will not respond to your request for speed change is that the part called the 'blower motor power module' is likely faulty. That module is located on the underside of the HVAC unit under the dash, just to the left of the blower motor which you will be able to identify by the sound/vibration, located at the far right end of the box. To get a good view of the box remove the silencer panel/duct on the lower edge of the dash on the passenger side. There are two twisted wires that connect the blower motor to the blower motor power module so all you need to do is look for that twisted pair of wires and follow them to the module. There are two screws that hold the module in place (it is inserted into the box, so all you will see is the plug and the 2 screws that you remove and the module will drop down out of the box). You can probably get a used one from a wrecking yard from any similar body Chrysler/Dodge that has an ATC type of control. Just put it back in place of the old one, retain it by the screws, put in the plug, and you should now have control over the blower speeds.
Roland
PS Thanks for the rating and the nomination. You can do it again if you so choose.
About the overheating, please describe what happens: does it boil over or does the gauge go the H without that happening? Are the fans coming on when the gauge goes to H? The next time you drive the car and the engine gets warmed up well, before it overheats, open the hood and notice that the radiator has metal manifold tanks at each side. The one on the passenger side will be hot to touch so be careful. The one on the driver side should be hot as well, though not as hot as on the passenger side. If it is really much cooler than means that the flow from the passenger side to the driver side is impaired. A radiator flush out may solve this problem. Otherwise let me know about my questions above.
