Heater blower motor not working

Tiny
WILLIAM DOG
  • MEMBER
  • 2004 FORD F-250
  • 5.4L
  • V8
  • 4WD
  • AUTOMATIC
  • 164,000 MILES
I checked fuses in the truck they are good. Is there a fuses box under the hood for the blower? I hooked the battery straight up to blower motor and it works. Any answers?
Do you
have the same problem?
Yes
No
Friday, March 19th, 2021 AT 6:09 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi,

First, we need to determine if power is getting to the blower motor. If you look at the first pics below, I included the entire wiring schematic for the HVAC system.

In pic 1, you will see the blower motor fuse and relay. Here are two links you may find helpful in checking both. Make sure when checking the fuse, there is power both to it and from it.

https://www.2carpros.com/articles/how-to-check-a-car-fuse

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

In pic 5, I highlighted the fuse and the relay to help you locate them.

If both check good, then you need to see if there is power via the brown wire with a white tracer at the blower motor resistor. Here is a link to help:

https://www.2carpros.com/articles/how-to-check-wiring

Let me know what you find or if you have other questions.

Take care,
Joe

Was this
answer
helpful?
Yes
No
Friday, March 19th, 2021 AT 7:45 PM

Please login or register to post a reply.

Sponsored links