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post #1 of 13 (permalink) Old 07-11-2011, 04:59 PM Thread Starter
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Blower fan motor wont run

I am new here but here is my dilemma. My 2005 300 fan blower motor will not run. The fuse is good and I have changed the fan blower resistor. I have checked the fan and it is good. The compressor kicks in and cycles but I get no fan to blow. Has anyone else experienced this p[roblem and could it be a relay or the switch. I am thinking realy because I have no power to the switch.
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post #2 of 13 (permalink) Old 07-12-2011, 11:05 AM
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Quote:
Originally Posted by BigE View Post
I am new here but here is my dilemma. My 2005 300 fan blower motor will not run. The fuse is good and I have changed the fan blower resistor. I have checked the fan and it is good. The compressor kicks in and cycles but I get no fan to blow. Has anyone else experienced this p[roblem and could it be a relay or the switch. I am thinking realy because I have no power to the switch.
BigE, this sounds similar to what happen on my 06 300c last summer. If you are talking about the cooling fans behind the radiator, I had the same issue. Come to find out there is a well known problem to Chrysler, but they don't tell you when you buy the fans.

Were your fans chipped and melted before you replaced them? Did you replace the whole fan assembly and motors or just the fans? I ask because I had the same problem. But I only replaced the fans only, and when they still didn’t work, I replaced both fan motors. I had no problem for a day or so. Then both fans died again. Turns out that the fan housing assembly cracks on the base right in the middle at the noticeable seam. When it cracks, those broken assembly pieces vibrate and once in a while it protrudes up far enough to chip at, or even stop the fan from turning altogether. Eventually this burns out the fan motors.

I hope this helps.
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post #3 of 13 (permalink) Old 07-12-2011, 12:40 PM Thread Starter
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I should have clarified a little further. The fan blower motor I refer to is the blower for the A/C-heater. I am thinking maybe a relay but not sure as the fuse is good. The car manual gives location of all fuses and what they are but not the relays. I was hoping to find out which relay is for the A/C blower motor. As I mentioned I have replaced the fan blower motor resistor and checked the fan. Thanks for your reply rehubley.
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post #4 of 13 (permalink) Old 07-12-2011, 06:12 PM
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Check "Relay - Run" and "Fuse 42" in Power Distribution Center (PDC) in the trunk.
For testing the "Relay - Run" it can be interchanged with either of the relays ("Relay- Rear window Defogger" or "Relay-Accessory DelaY") adjacent to it.

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post #5 of 13 (permalink) Old 07-15-2011, 06:45 PM Thread Starter
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Thanks Desiree, I checked all Fuses , Relays and Circuit breakers. I have tested fan with an outside power source and it will blow. I have changed the bloer motor resistor and still no fan. I am starting to wonder about the AC/heater control. I have checked and you can't buy just the switch. I am still checking to see if there is a relay under the dash. Anyone have any other ideas? Thanks
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post #6 of 13 (permalink) Old 09-12-2012, 08:14 PM
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Did you ever find an answer to this problem. I see the last post left the issue still open. I am having the same problem, 06, 300 touring. replaced the climate control mod (simple control, no dual). had a problem with the climate control lights being out ever since I bought the car. Then one day the fan blower stopped working so I thought the climate control had finally gone completely. replaced it, still no fan working, but the lights are on again! I'm just starting to chase this down, so I don't even know where to find the blower motor. I have seen many references to the blower motor resistor, but it sounds like you've tried that already. :\ I'm frustrated. I love this car, but sick of the little quality issues that are starting to turn this thing from a cool ride to a high maintenance hottie. Electrical issues are a bad sign, and this is my third... I need an EASY fix or I'm going to cut and run.
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post #7 of 13 (permalink) Old 09-13-2012, 10:29 PM
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The blower motor is behind the glove box, very easy to get to from the footwell. The resistor is back there as well

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post #8 of 13 (permalink) Old 09-14-2012, 12:25 AM
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Here is the partial wiring diagram for the blower. Check for 12V at the blower itself. If you have voltage there the ground may be bad. If you don't have 12V at the blower and the ground is good you will need more diagrams, which I have, to troubleshoot further. Bob.
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Last edited by BobF; 09-14-2012 at 12:27 AM.
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post #9 of 13 (permalink) Old 09-15-2012, 09:26 AM
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Thanks Pioneer and BobF. Found the blower, but not sure which part is the resistor. Have attached some pictures to help identify. BobF - regarding checking the 12V at the blower itself, can you explain a bit more. I assume you mean to put a meter to the contacts on the blower. I have one, but am not a well versed on how to use it. Or should I be checking the connection on the cable end at the connector? Attached in photo #4 is parts diagram from the dealer (note, the blower looks upside down in the diagram. lol), and some pictures from under the dash. In #1, is this the Resistor block? #2 - the wire harness that connects to the blower appears to lead off in 2 directions. 1 leads off to the connection in photo #1, the other leads to this connection in photo #2. Any idea what this connection is for? Photo #3, almost removed this part thinking it was the blower motor. What is it? photo #4 blower motor removed. Is this the connection where I should check for 12V?
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post #10 of 13 (permalink) Old 09-16-2012, 07:58 AM
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Quote:
Originally Posted by sdrolz View Post
Thanks Pioneer and BobF. Found the blower, but not sure which part is the resistor. Have attached some pictures to help identify. BobF - regarding checking the 12V at the blower itself, can you explain a bit more. I assume you mean to put a meter to the contacts on the blower. I have one, but am not a well versed on how to use it. Or should I be checking the connection on the cable end at the connector? Attached in photo #4 is parts diagram from the dealer (note, the blower looks upside down in the diagram. lol), and some pictures from under the dash. In #1, is this the Resistor block? Looks like it to me #2 - the wire harness that connects to the blower appears to lead off in 2 directions. 1 leads off to the connection in photo #1, the other leads to this connection in photo #2. Any idea what this connection is for? No idea Photo #3, almost removed this part thinking it was the blower motor. What is it? That looks like the blower motor, should be 4 screws holding it in . photo #4 blower motor removed. Is this the connection where I should check for 12V?
You could always get a chilton repair manual from the library.. Takes all the guessing out..
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