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Mad Titan
Dodge Dakota
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7/07/2004
22:35:26
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 Subject: 4.7 DQC A/C Failure
IP: Logged
Message:
I have a 2001 4.7 DQC and recently my A/C took a dump.
My A/C fan is good - I pulled it out and checked it with a 12V power supply.
I've checked every single fuse and relay I could find - under the dash and under the hood.
I've tested the voltage at the A/C fan connector and there is 12.5 VDC there BUT NO GROUND.
I shorted the fan to ground and it started spinning.
I pulled my dash apart this evening and removed the environmental controls and gave them a quick visual check - no obvious component damage.
I can still change the vent settings and I can turn on the A/C compressor but the fan will not engage.
There is a temp sensor of some kind in the A/C ducting underneath the dash - it almost looks like an airflow sensor.
I shorted out 2 pins on the sensor's connector and my fan came on full blast and I could turn it on and off with the A/C switch.
ON and OFF - no adjusting the fan flow.
Full blast or nothing.
I'm leaning towards this airflow/temp sensor being bad but I wanted to check in here before I went to the dealer and started dishing my hard-earned funds.
Has anyone elses A/C unit behaved like this?
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Ac
Dodge Dakota
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7/07/2004
22:59:08
|  RE: 4.7 DQC A/C Failure
IP: Logged
Message:
does the fan work on heat?
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Mad Titan
Dodge Dakota
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7/08/2004
12:34:08
| RE: 4.7 DQC A/C Failure
IP: Logged
Message:
No. The fan doesn't come on at all.
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RobRacin
Dodge Dakota
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7/09/2004
01:34:11
| RE: 4.7 DQC A/C Failure
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Message:
This problem is known among Durango & Daks. The blower only working in the full blast position is a sign of the blower moter resistor failure. The resistor runs about 18 bucks. It is located under the cowl under the right wiper. About a half an hour job to replace. Hope this helps.
Rob
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bdholsin
Dodge Dakota
JOIN HERE
7/10/2004
11:50:56
| RE: 4.7 DQC A/C Failure
IP: Logged
Message:
Is the resistor block a dealer only item? I can't seem to find one for my '97 3.9L Dakota at any of the local part stores. My blower is intermittent. Once it blows for a few minutes on the M2 setting it ramps down. I have to move it to the high setting to get a volume of air equal to the M2 setting. Sometimes when I start the truck when it is warm/hot out the blower won't move ANY air for a few minutes.
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