At Fixya.com, our trusted experts are meticulously vetted and possess extensive experience in their respective fields. Backed by a community of knowledgeable professionals, our platform ensures that the solutions provided are thoroughly researched and validated.
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
Many vehicles that have both front and rear A/C systems utilize two blower motors; one for the front vents and one for the rear vents. Each blower motor also likely has its own dedicated blower motor resistor to enable independent airflow control. The most common failure items in blower motor circuits are the blower motor and resistor. When a blower motor fails it will not work on any speed setting. Blower motor resistors however, tend to maintain proper operation on HIGH speed but none of the lower speeds; this is not always the case though. Proper diagnosis begins with checking for power at the blower motor. If power is present, the blower motor has likely failed. If no power is present, the blower motor resistor should be checked for power. If power input is present but no output, the resistor has failed. If there is no power input, the fuse should be checked as either one of the component failures could have caused it to blow. After replacing the fuse the same checks should be made again to determine where the power flow stops and why. You can read more here: https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-heater-blower-motor-resistor
In the diagram, blower motor, top wire is voltage, bottom wire is ground. With everything on, check the wiring connector for blower motor, use a test light and check voltage and ground. As you can see, the blower resister and front blower switch are on the ground circuit for blower motor.
There are fuses involved. I didn't look at rear blower motor.
check blower switch blower motor and blower also check the resister for blower motor if it does it wile at a stop reach over and tap on blower motor and see if it comes back on if it does most likely it blower motor
check or replace your front blower motor resistor. this is the most common problem aside from a bad blower switch. you could also try to recalibrate your system but that usually doesn't work. I'm betting on the resistor.
×