When the blower motor relay does begin to fail the vehicle will usually display a few symptoms that alert the driver of a potential problem that should be serviced.
Ford f150 blower motor resistor keeps burning out.
This is why at the bottom of the article we include a 2008 f150 blower motor wire diagram.
Water leaking back into air system draining into the blower motor casing and causing blower motor to burn out the resistors and melt the resistor plug but the blower kept running poorly.
The blower motor relay controls the current used to power the blower motor and is subject to the constant on and off switching.
Water leaves and debris in the airflow can cause blower motor resistor failure.
Verified i would suspect the blower motor is the problem if the resister keeps burning up if there is a large draw because of the blower motor it can cause this this can be tested but a amp probe would be needed typically only mechanics have this tool.
I finally found the simple solution and ultimately the actual cause to the issue of the blower resistor burning out and over heating the plug wiring the blower motor itself is the culprit.
Purchase an upgraded pigtail and splice it into the harness along with a new blower motor resistor.
After years of replacing the blown resister module 3 to 4 a year i finally bit the bullet and bought a new blower fan motor.
The ford blower motor resistor assembly covered by this tutorial has 3 different resistors in series and depending through which resistors the blower motor current is flowing thru on its way to ground you ll get one of three speeds.
Thanks in advance if you can assist me.
Yesterday the air stopped blowing again wouldnt work on any speed.
Basics of troubleshooting the blower control resistor.
For any damage or signs of burning.
I checked the blower relay and the guy at autozone said if the relay is bad then i will hear clicking under the hood while the motor is running.
Ford blower motor resistor problems remain the most common solution to interior fan malfunctions on ford cars and trucks.
It starts out slow and you figure there is something wrong with resistor resistor connector which melted or the blower motor s old or they don t make these blower motors like they used to.
I have a 2008 f150 4 6 v8 while driving with my ac on and fan on high the fan blower briefly cut in and out and then blower stopped working.
Daryl shop owner master mechanic.
Lo m1 and m2.
Over time it can eventually wear out.
Conduct an amperage draw test at the same time to rule out excessive current draw from the blower motor.
I originally replaced the blower motor resistor and it worked for about two weeks.
With that said failed blower resistor assemblies don t solve all of the possible failures.
Buy yours here http amzn to 1niz5xj this is the quick and easy steps to changing your blower motor resistor on any f150 2004 2005 2006 2007 2008 2009 20.
I replaced the blower resistor and it worked just fine for about 2 weeks.
Also make sure.
