How do you change the heater blower motor resistor on a 1997 pathfinder you tube

There are three culprits that may cause this.

1:Many people have great luck with replacing the resistor unit for the blower motor. While I cannot guarantee this is the issue you have, it is the most common. (Approx $45. )
eBay link.. http://www.ebay.com/itm/Heater-Blower-Motor-Resistor-For-Nissan-Pathfinder-Xterra-Titan-Pickup-Truck-/131110853460?hash=item1e86d0db54&vxp=mtr

2: Others have luck when replacing the actual Plastic switch inside. This runs about $50

3: Then there is the blower motor amplifier.. (approx $110)
http://www.ebay.com/itm/NISSAN-PATHFINDER-BLOWER-MOTOR-AMPLIFIER-POWER-MODULE-1996-2004-/231422243697?pt=Motors_Car_Truck_Parts_Accessories&hash=item35e1d73371&vxp=mtr

Your service manual will show location of these items or a quick search online for schematic for your model will produce results to assist you from here.

Hope this helps.

HERE'S A LINK TO THE BLOWER MOTOR,IT SAYS THE RESISTOR IS IN THE REAR OF THE HOUSING,2 SCREWS HOLD IT ON. Repair Guides Auxiliary Heating Air Conditioning Components Blower...HERE'S WHAT IT LOOK'S LIKE. Heater Blower Motor Resistor 2002 Nissan Datsun Pathfinder 2WD 6...

See me at website for images can only send one through this channel. www.autorepairhelp.us

Best Regards,

Master Tech Lee

HEATER BOX SHIELD
Image
Heater Box Heat Shield
Remove or Disconnect
1. Fasteners that retain heat shield to heater box assembly.
Image [ Heater Box Heat Shield
Install or Connect
1.Fasteners that retain heat shield to heater box assembly.
Tighten
-Bolts Screws to 2.2 N.m (25 lb in).
HEATER ASSEMBLY
Image ' Heater Hoses
Image ' A/C Evaporator Tube Assembly
Image ' Evaporator Core
Image ' Evaporator Core Assembly
Image ' Heater Assembly
Remove or Disconnect
1.Engine coolant. Refer to Draining and Filling Cooling System in Engine Cooling.
2.Heater hoses. Refer to Heater Hoses.
3.Instrument panel. Refer to Instrument Panel Replacement in Interior Trim.
4.Air inlet assembly. Refer to Air Inlet Assembly Replacement.
5.Vacuum lines.
Important
-Clearly label vacuum line connections.
6.Heater assembly studs inside engine bay.
7.Blower motor resistor. Refer to Blower Motor Resistor.
8.Stud inside heater core housing.
-Stud is revealed by removing the blower motor resistor.
9.Rear case screws.
10.Heater assembly.
11.Seals.
Imagt
Imagt
Imagt
Imagt
Imagt
Heater Hoses
A/C Evaporator Tube Assembly
Evaporator Core
Evaporator Core Assembly
Heater Assembly
Install or Connect
1.Seals.
2.Heater assembly.
3.Rear case screws.
4.Stud inside heater core housing.
Tighten
-Stud to 1.9 N.m (17 lb in).
5.Blower motor resistor. Refer to Blower Motor Resistor.
6.Heater assembly studs inside engine bay.
Tighten
-Studs to 1.9 N.m (17 lb in).
7.Vacuum lines.
8.Air inlet assembly. Refer to Air Inlet Assembly Replacement.
9.Instrument panel. Refer to Instrument Panel Replacement in Interior Trim.
10.Heater hoses. Refer to Heater Hoses.
11.Engine coolant. Refer to Draining and Filling Cooling System in Engine Cooling.
-Check the system for leaks.


Auto Repair Help US

For the screeching noise you need to replace the blower motor and for the blower motor speed you need to replace the blower motor resistor.

Sounds like an issue with the blower motor relay. Would recommend replacement of the relay and the blower motor it self. When a blower motor starts to fail, it will pull a lot of current through the resistor causing damage and not allowing it to work properly.

Good Evening, If I am translating this properly your fan only works on the high setting? And the other settings do not change the speed? If this is correct respond back and I will help as much as possible.

replace water pump on first question,second replace the speed switch.










TIM..

Good chance it's the resistor . Will be in circuit between switch and blower, usual locations are on ducting under dash on passenger side, or behind glove box. Locate wires coming from blower motor, and follow them back to resistor.

There was a bulletin reguarding water contaminating the blower motor, which overheats the blower resistor and renders it inoperative. The fix was to replace the blower and the resistor and seal the culprit hood cowl screw at the base of the windshield, which is the second screw from the passenger side. They say water drips off of it down into the fresh air opening.
Here's what I'd do: Assuming your switch and blower motor is good, replace the blower resistor. Remove the blower motor and see if it spins without any excessive drag. If it's okay, reuse it. If it's dragging, it will overheat your new resistor in a short period of time and you'll be back at square one. The blower resistor is mounted to the front of the case with 2 screws to the left of the blower motor. Remove the glove box and you'll see it.
The Hood cowl screw is straight down into the cowl, the second one from the right side, about 10-12 inches from the right fender. Pull it out, put some sealer on it, and reinstall it.

this is usually caused by the blower resistor. it is located under dash on pass side. up close to firewall by the blower motor. need to confirm power is not going to fan also if you have power and ground to fan it is bad fan motor. if not most likely a bad resistor