Why does my GM blower motor resistor keep failing?

In some cases, the heat is so high that it melts the connector. This is common on late model GM vehicles. If you discover a melted connector, do NOT attempt repair. Purchase an upgraded pigtail and splice it into the harness along with a new blower motor resistor.

Is the blower resistor on my GMC Sierra on fire?

This was preformed on a 2004 GMC Sierra with a blower resistor that had been on fire and melted the wiring. Loading…

What are the symptoms of a bad heater motor resistor?

Symptoms of a Bad or Failing Heater Blower Motor Resistor. 1 1. Blower motor stuck on one speed. A common symptom of a faulty blower motor resistor is a blower motor that is stuck on one setting. The blower 2 2. Blower motor does not work on certain settings. 3 3. No air from the vehicle’s vents.

Why is my blower motor stuck on one speed?

Blower motor stuck on one speed A common symptom of a faulty blower motor resistor is a blower motor that is stuck on one setting. The blower motor resistor is the component directly responsible for controlling the blower motor fan speed. If the resistor shorts or fails, it may cause the blower motor to remain stuck on one fan speed.

This was preformed on a 2004 GMC Sierra with a blower resistor that had been on fire and melted the wiring. Loading…

Is the blower motor on my Chevy Colorado working?

My blower motor will not work at all, NOT on 1, 2, 3, or 4. However when I turn the selector from 0 to 1 I read 12v at the plug that goes into the motor. When I change to 2, 3, or 4 still reads 12V.

Where is the Colorado blower not resistor plug?

Open your passenger side door. Remove the plastic trim right on the floor. Under where the door would be when it’s closed. Then remove that kick panel under the dash. There should be a big blue plug behind there. Unplug it and check the connections. I think it’s the brown wire. It melted in that plug and caused it to lose connection.

Where is the resistor on a Chevy Colorado?

You mention it’s not the resistor but you don’t mention if you changed it out or not. Sounds like the motor is good because it runs when you jumped the ground wire. The ground for it is on the passenger side fender behind the air box.

How does a resistor work on a blower motor?

Other car makers reverse that and run power to the blower motor first and terminate ground at the blower fan speed switch. By it’s very nature, resistors resist the flow of electricity, much like a flow restrictor in a pipe.

Where does the power go in a blower motor?

For each higher speed, power flows through one less resistor. Some car makers run blower motor power through the fan speed switch first, then through the blower motor resistor and then to the blower motor and ground. Other car makers reverse that and run power to the blower motor first and terminate ground at the blower fan speed switch.

Why does my Dakota blower resistor keep going bad?

When your Dakota or Durango left the factory, it had a Mopar motor and voltage resister that were compatible with each other. After 10-15 years the motor wears out , begins to draws more amps burns up the resister. Most people replace the wiring harness and the resister with. cheap replacement from Autozone / Advanced etc.

What are the symptoms of a failed blower motor resistor?

Blower motor resistor problems. Problems with a blower motor resistor are common in many cars. The most common symptom of a failed blower motor resistor is when the heater fan only runs at high speed and doesn’t work at low speeds.

Where is the blower motor resistor on a Mazda 5?

In many cars it’s fairly easy; the blower motor is located behind the glove box and held by 3-4 screws. In others it might be located inside the dash (e;g Mazda 5) which makes replacement difficult. If you need a proper diagnostic procedure, we posted several links where you can access a service manual for your car for a subscription fee.

What should I do if my heater is close to zero voltage?

If the voltage is close to zero on the positive heater wire, then locate the open circuit in the power wire back to the fuse. Again, it may have a relay in the circuit as well.

How to diagnose O2 sensor heater circuit failure?

The modified test harness with the light will give you easy access to the circuit. Remember, the engine needs to be running at this point. If the voltage is close to zero on the positive heater wire, then locate the open circuit in the power wire back to the fuse. Again, it may have a relay in the circuit as well.

Why does my O2 heater light keep going off?

If the wire from the O 2 heater connector to the computer is shorted to ground, the light will still be on. Trace the wiring harness back to the computer while monitoring the light. When you locate the area of the short, the light may again flicker or go off.

What kind of blower circuit does Dodge Dakota have?

Here is a the blower circuit for a 2002 Dodge Dakota. Hopefully it is the same for your particular year model.

What does the blower motor resistor do in a car?

The blower motor resistor is an electrical component that is a part of the vehicle’s heating and air conditioning system. It is responsible for controlling the blower motor’s fan speed. When fan speed is changed via the knob on the instrument cluster, the blower motor resistor changes setting, which changes the speed of the blower motor.

How to change heater blower resistor, 1999-2013?

Gm used to use a card (very thin) with resitances built in to control blower speed they overheated easily and died. In the last couple of years we have gone to a much beefier type of resistor that dissapates heat much better.

Can a bad blower take out a resistor?

A bad blower will take out a resistor but resistor replacement especially the original on a 2000 is common. Gm used to use a card (very thin) with resitances built in to control blower speed they overheated easily and died. In the last couple of years we have gone to a much beefier type of resistor that dissapates heat much better.

Where is the fan resistor located on a 2005 Colorado?

Remove the big black cover with the round end under the glove box where the cabin air filter is. You’ll see it attached to the fan box. I have a 2005 Colorado with the same fan motor problem – only runs on level 4 (high); where is the resistor box located and is there a part number for replacement

When did I replace the blower motor on my Jeep?

I brought the Jeep back in on 3 August 2016 to have the parts replaced. Two parts were replaced at that time: 1. Module/resistor/power, blower motor (P/N 68079480AA Module – Power)

Why is my a / C blower not working in my Grand Cherokee?

However, over the next few weeks the A/C blower problem returned intermittently. It seems to be a problem when the temp is around 80 degrees or higher and the car has been sitting in the sun. The problem again happened on 6 October (a warm day) and it was exactly the same problem originally described.

Is there a blower resistor for the Jeep Grand Cherokee?

Shop AutoZone for Jeep Grand Cherokee Blower Motor Resistor. 10% OFF $75. Use Code: DIYSAVE10 Online Ship-to-Home Orders Only

How to fix AC and heater in 1999 Jeep Grand Cherokee?

Clarify it by editing! The 1999-2004 Jeep Grand Cherokee has a common failure where the blower fan wire adapter overheats and melts. Use this guide to fix and repair this connector and get your AC and Heater working again! No parts specified. Place the car in park, activate the parking brake, and leave the car running.

What to do if your Jeep Grand Cherokee fan does not turn on?

If the fan does not turn on, the damage may not be fixable without purchasing new parts. For your safety do not grasp any wires you can not see. Do not attempt to grasp any wires that are not covered in insulation and/or electrical tape. Turn off the ignition on the vehicle and proceed with the following steps.

How to remove AC adapter from Jeep Grand Cherokee?

There are two screws holding the adapter in place. Using a Phillips head screwdriver, remove both screws in order to remove and gain access to the adapter. The two screws are identical. Be careful not to lose them. Be sure the car is completely off before unscrewing anything.

What to do if your blower motor melts?

Jeep’s fix was to replace the melted blower motor resistor and install a new wire harness with updated connectors. The problem was with too much resistance in the connector which generated heat. Very scary since there are numerous stories of GC’s starting on fire related to this issue.

What causes a connector to melt on a Jeep Wrangler?

The problem with the connector melting is simply a poor connection at the connector resulting from either loose or corroded connectors. With a poor connection there, it in fact becomes a second fuse with a smaller value than the circuit fuse and as it starts to burn through, produces heat melting the plastic connector.

Navigation