Question about 2002 Nissan Maxima

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Blower motor for heater is not working. resistor is new and motor has been tested fine out of the car. It has 2 wires at the motor neither is hot when the car is running and the heater fan is on high. what to do next?

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Check fuse
check power before resistor
if there power to resistor and none at the blower motor connector the resistor is bad (even if it is new)
if no power to resistor must follow power from fuse to the resistor.
try the first two tips first

Hope this helps, it it does please leave feedback Thank You and Good Luck

Posted on Jan 01, 2011

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Posted on Jan 02, 2017

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Blower motor only works on low and medium on 2007 dodge nitro


You replaced the resistor and WHAT relay? The blower motor circuit on a 2007 Dodge Nitro does not use a relay.

The blower resistor gets it's power from the A/C - heater control unit.

If you check for voltage at the blower motor resistor connector (Key on, relay disconnected), the DARK BLUE/GREY wire should be hot when the control switch is on HIGH. The DARK BLUE/VIOLET wire should be hot with the switch in the MEDIUM 2 position.The DARK BLUE/ORANGE wire should be hot with the switch in the MEDIUM 1 position. The DARK BLUE/BROWN wire should be hot with the switch on LOW.

If any of these are not as stated above, then you either have a bad A/C - heater control unit, or faulty wiring between the control unit and the resistor.

Jun 02, 2012 | 2007 Dodge Nitro R/T New Cars

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Need to replace ac/heater fan resistor I am not sure of the location does anyone know? Thank You


The Blower Motor Resistor is located on the passenger side firewall, not far from your A/C's H-Valve (or expansion valve), going inside of the vehicle. The blower motor resistor has a 4 or 5 way black connector plugged into it and this is the only visible portion of the Resistor you will see. Remove the wiring connector and remove the 2 or 3 screws with an 8 mm or 5/16" socket (8 mm and 5/16" are the same). Once the screws or fasteners are removed, just pull the blower motor resistor out of the firewall and if you look at it, it will have various coils of wire on it, sometimes it will show burnt coils, but you can always check the various coils with an Ohm-meter.

Aside from that, install the new Blower Motor Resistor and Voilà! Your inside Blower Motor should work just fine.

A brief note here, if your fan doesn't work when the fan switch is on High, then it's not the Blower Motor Resistor, but possibly the Blower Motor itself. Should this occur, please get back to me insofar as how to replace the blower motor and why the blower motor's wires have to be twisted...even with the new blower motor fan.

Best of Luck,

"00 Buck"

"Still living on the Right Side of Dirt..."

Jun 05, 2010 | 2001 Dodge Caravan

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My heater isnt blowing out any hot or cold air how do i fix problem if i hit blower motor sometimes it will kick on but onlt on high


The blower motor needs to be replaced. Also if it only blows on high the blower motor resister block may need to be replaced as well.

Feb 25, 2010 | 1997 Chevrolet C1500

1 Answer

1999 jeep grand cherokee heater fan quit. 40amp fuse under hood good. both wires at motor test hot. motor turns strong when wired direct to battery. now what?


the blower motor resistor is bad replace it and it will work good as new the resistor is located in the same heater box as the blower motor mounted on the outside of the heater box follow the wirring from the blower motor to find it or just simply buy the part and match it up

Jan 11, 2010 | 1999 Jeep Grand Cherokee

1 Answer

Heater fan not working. 40amp fuse under hood ok. wires to fan test hot. motor turns strong when hooked directly to battery


"...wires to fan test hot." But what is the voltage? Since the Fuse and Motor is good, and there is voltage (unk strength) to the Motor; this only leaves the Blower Motor Resistor. Does the Fan work on High Only? Then it is definitely the Blower (Fan) Motor Resistor.

Jan 10, 2010 | 1999 Jeep Grand Cherokee

1 Answer

Blower motor won't work, even with new motor.


Hello Travis.
If yours is dual zone, I believe the resistor (blower control module) is a solid state. Did you check it using the fan speed selector and test the voltage output on the purple wire?
The gray black wire going into the resistor is a variable voltage output from the heater control panel. This signal is amplified by the resistor/blower control module.
The black wire out of the resistor also needs proper good ground.
There is a fuse in the underhood relay/fuse panel that feedback from the resistor output to the blower (purple wire) is also fed back to the heater control panel. Verify this fuse is good.

When blower motors go bad they will often absorb a lot of electrical current. This current has to go through the blower control/resistor and will often burn them out due to the heat developed from the high current load.
These resistors are also mounted in the airflow out of the fan motor to help cool them so if the fan is still drawing current and not blowing the resistor overloads and burns it out.
Not sure how you tested the resistor but I suspect yours is faulty.
If you would like more advise let me know.

KL


Jan 04, 2010 | 1993 Buick LeSabre

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