Question about 2003 Dodge Durango

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2003 dodge durango, fan willnot run

I have checked the fuses and know that the fan works. i am getting 12 volts at the fan connector.

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Have you checked the fans while running the A/C on both high and low speeds? If they don't kick on here, your relays are bad. If they do kick on, I would look into your Engine Coolant Temperature Sensor (a two wire wiring harness leads into it and is located near your thermostat housing). If this sensor goes bad, it will not transmit the signal to the PCM telling it to activate the relays.

Posted on Sep 10, 2009


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The a/c and heater fan does not work

Kerry, Check all fuses and relays, quite often it is the blower motor resistor. 3 rd link will show diagnosing fan. Check the attached links,instruction and guides, Good luck
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maybe, maybe not. First thing, does the aux power ( cig lighter) work? if not then most likely the fuse that supplies power to both is bad. Next thing to check is if the connunication port is getting power. If you look at the port under the dash there are two rows of slots. numbering is 1-8 across the top row left to right, and 9-16 across the bottom row left to right. 4 & 5 are ground and 16 is power. Should have 12 Volts, if not and the fuse is good, then you might have a bad PCM.

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Remove the two connectors to the battery, clean battery posts and internal parts of the connectors. Apply anti-corrosion grease (from an auto parts supplier) to posts and connector internals. Wash your hands afterward to prevent mysterious holes appearing in your clothes. If the battery is discharged, put it on a charger (4 to 6 amps @ 12 volts--overnight). When battery is charged, try to start the engine. If ok, then measure with a voltmeter across the battery--should read 13.5 to 14.5 volts with engine running and 12.6 volts when not running. If the voltage remains at 12.6 volts with the engine running, then the alternator is not charging the battery. Get it checked at an auto parts supplier--most will do it for free in hopes that you will buy a needed replacement from them. Good luck!

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Jul 27, 2009 | 2003 Dodge Durango

1 Answer

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If your blower only worked on high before it quit, or didnt work on high before it quit,

You probably have a faulty blower motor resistor assembly. The part number is 04885635ab If you look on the bottom of the motor housing on the passenger side (about where the passenger toes would point) you will see a wire harness that is a long oval in shape and has 5 or 6 wires in it. You will need a 7 or 8mm 1/4 inch drive socket with a u-joint attachment. on the firewall side of the connector, there is a sliding lock that keeps the connector on the plug. you will have to slide the lock toward the drivers side and the squeeze a small blak tab to pull the connector off of the plug. Once the connector is off, use the socket to remove the 2 screws. It will drop right down once the screws are removed. Once it is removed, it looks like a 2 inch by 3 inch by 16th of an inch thick piece of metal with a plug on it. The resistor pack dissipates ALOT of heat so do not take it out until the truck has been off for 30 minutes or so. I priced the part at a dealership for $12.77

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if the fuse was blown the stop lights on both sides would be inop, also if the stop light circuit were dead u would be unable to get the trans out of park, use a 12 volt test light and test the brake light switch at the top of the brake pedal, u can buy a test light from Autozone, kragen and others for about $5 US. If the system has power cjheck the bulb socket it may be defective, use the 12 volt test light while someone pushes the brake pedal. let me know what u find and i will give u further assistance as ness.

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