Skip the auto shop - Our mechanics make house calls

Q: There is a wire at the bottom of the A/C fan that is not connected to anything. What is this wire?

asked by on

There is a wire at the bottom of a/c fan that is not connected to anything
My car has an automatic transmission.

A: I assume this is a wire with a connector on...

I assume this is a wire with a connector on the end, if not, then a loose wire with out an end is part of a damaged harness. If this is the case, I will not be able to tell you what the wire goes to. If it is what I suspect, a connector with nothing connected to it, then this would most likely be normal. If the car runs normally, it doesn't overheat and has not had any recent work done, this is simply a connector the manufacturer did not use.

Manufacturers build wiring harnesses that will fit all their cars. It's simpler to build a bunch of the same harnesses than a different harness for each car with different accessories. This is why it is very common for connectors to be present with nothing attached to them.

If you just finished repairing your own car, and are certain it went somewhere, I suggest looking at the connector from a different perspective. Say, lay on you back and look around under the car from there. As a technician, it is common to put a car back together and be left wondering what was connected to that. Changing my perspective has been my go to method to discover what plugs into it. If you just had your car worked on my someone, return to them and ask.

If everything works correctly, and you haven't had any recent work done, that connector will be normal. However, if you notice any issues or want a fresh pair of eyes on this, consider YourMechanic as a certified technician can diagnose your A/C and help pinpoint the use of the wire in person.

Good luck!

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Window motor broken

If your window motor is not engaging, it is likely that the motor has gone bad. It is also possible that the switch has gone bad, unless the window also rolls down, which would indicate that the switch is likely...

Q: What's is causing a bump in my steering wheel, worst when slowing down but not braking

Hello and thank you for contacting YourMechanic. Check the condition of the tires on the front to make sure that they are not cupped. If the tires are cupped, you will need to replace the tires and check the shocks....

Q: Ac cuts in and out

First of all, your A/C is not likely the problem here. It is just one of the systems that is being affected by the problem. Most likely you have a bad power connection that supplies power to your dash. The...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.