How to test a blower motor resistor in the garage?
Look for obvious signs of corrosion and burns from overheating. If you want to do a quick test of the blower resistor, you can check the resistance of each of the resistors with a multimeter as follows: set the tool to read ohms (a measurement of resistance) and connect one of its probes to the common output terminal of the resistor.
What are the symptoms of a bad engine control module?
1. Check Engine Light Turns On 2. Engine Stalling or Misfiring 3. Engine Performance Issues 4. Car Not Starting 5. Poor Fuel Economy The engine control module (ECM), also commonly referred to as the engine control unit (ECU) or powertrain control module (PCM), is one of the most important components found on virtually all modern vehicles.
What to do if your body control module fails?
As much as you want to know more about the Body Control Module (BCM) of your car, when it fails and replacement is sure to happen, it is better that your most trusted mechanic or technician do the job.
1. Check Engine Light Turns On 2. Engine Stalling or Misfiring 3. Engine Performance Issues 4. Car Not Starting 5. Poor Fuel Economy The engine control module (ECM), also commonly referred to as the engine control unit (ECU) or powertrain control module (PCM), is one of the most important components found on virtually all modern vehicles.
How to test an ignition control module [ video ]?
How to Test an Ignition Control Module. 1 Step 1. Remove one plug wire at the spark plug and insert an old spark plug into the end of the plug boot. Place the spark plug on a metal surface on 2 Step 2. 3 Step 3. 4 Step 4.
Where is the brown wire on a PTO clutch?
It should be at 12 volts whenever the key is in the RUN position and either pin 7 (the bypass from the neutral switch) or pin 9 (the seat occupied sensor) have 12 volts on them. The #600 brown wire is actually on the pin 1 of connector x23 and goes to the charge light on the dash…
When to suspect TDC for PTO clutch power?
IF and ONLY IF you have voltage at pin 9 of X22 and do not have it at pin 4 of X23 can we begin to suspect the TDCM (and then only if the fuses and all the connections and grounds are otherwise sound…) Let us know what you find and we can continue trouble shooting until the root cause is discovered.
How does a blower motor resistor control the fan speed?
The blower motor resistor controls the fan speed of the blower motor and the resulting change in air pressure produced by the movement of the blower fan. It accomplishes this by regulating the electric current that powers the motor.
Can a broken motor switch stop a blower?
A broken blower motor switch can also stop the blower from changing to certain speed settings. If your blower motor cannot change to certain speeds, check both the resistor and the switch on your dashboard. The most common failure points are the resistor and the motor itself.
Where is the blower motor on my car?
The blower motor in your car is under the passenger side dashboard. If you can get to the bottom of the dashboard there should be a plastic panel on the passenger side you can remove to expose the blower motor. There are 4 screws that hold it up under your dash.
Why is the blower motor on my Nissan Altima not working?
Unfortunately the blower motor on the Altima is not working. The Blower motor LED lights light up to high speed but no fan. I am no where near the car ( My wife has it far away ) but I’m wondering if it is a fuse or the motor?
What causes a blower motor to run faster?
At maximum fan speed setting, the fan control amp allows nearly all 12v across the motor, which causes the fan to run faster. Not sure how much one of these fan control amps cost new or from a junkyard, but mine was a simple fix since it was just the temperture cutout had blown.
How many fuses does a blower motor take?
This circuit takes 2 15 amp fuses, i learned my lesson when i blew both and only replaced one, and wondered why i kept blowing that fuse. The fuses will be listed on that little panel you take off. Oddly enough, I noticed my ’03 3.5SE blower fan wasn’t working yesterday as well (mine is an automatic temp adjust).
How do you fix a blower motor on a car?
Disconnect the electrical connector at the blower motor and jumper power and ground to the motor, bypassing all the speeds controls. Run a fused jumper from the battery to the power side of the motor and connect a temporary grounding jumper to the other motor terminal.
How can I tell if my blower motor is failing?
On all systems, a failed blower motor is least likely. Blower motors generally don’t fail out of the clear blue. In most cases, they start to fail by making a high pitched squeal or screeching noise that indicates the bearing is failing.
Why does my blower motor make a squealing noise?
The squealing noise happens most often in the winter during cold startups and may disappear as the motor heats up. If you ignore the noise, the bearing will continue to wear to the point where the motor won’t start at all. The reason I’m not including the motor resistor as a suspect is because it usually only controls the lower speeds.
When to test the blower control module ( GM )?
If your multimeter still does not register battery power or Ground in the indicated blower control module connector terminals, then you have found the problem that’ s keeping the blower motor from working or functioning correctly. If power is missing from the small connector Terminal B, then you need to check to see if the underhood fuse is blown.
Why is my GM 3.8L blower not working?
If the blower motor in your 3.8L GM vehicle is stuck in only one speed (usually stuck in high) or no blower speeds work, then there’s a good chance that the blower control module is bad and behind the problem.
How many volts does a blower control panel have?
Depending on what blower speed is selected from the A/C-Heater control panel, this voltage can range between 0 and 12 Volts.