Skip the auto shop - Our mechanics make house calls

Q: AC, speedometer, and windows not working

asked by on

The AC, speedometer and three of the windows in my vehicle are not working.

Hello. Depending on how and when these items began to fail will make a difference as to what is going on. If they all occurred at the same time, then I would suspect an issue with the fuse box. It is common for the connections in the fuse box to fail over time due to heat. I have also had issues with the wiring in the dash if it has an aftermarket radio in it. If they all failed at different times then they all need to be checked separately.

The windows may all have bad window motors. I check these by removing the door panels and checking for power at the motors. If there is power when operating the switches then the motors are bad.

The speedometer may have failed due to a bad vehicle speed sensor or an issue with the speedometer itself.

The AC can stop operating from low refrigerant, which is the most common, or an electrical failure. I have seen a lot of compressors fail on this engine.

It will take quite a bit of electrical diagnostics to find these issues. If you plan on having this looked at, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose all of these electrical components and make the necessary repairs.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: Power windows and blinkers don't work.

Hi there. The relay to the windows could have stopped working. Also, the flasher or relay could have stopped working as well. Since these are two different electrical circuits, it could be possible that both relays quit, but more an...

Q: AC compressor drains the headlights and coolant indicator, check engine light is on

You need to check the engine block grounds on the left and right side of the engine block. Follow the neg. cable down to the engine and make sure it is very tight. Another ground is on the radiator support...

Q: What should I do if my engine overheats?

The coolant in the radiator should keep your engine within the ideal operating temperature range. However, if the coolant is low, you have a leak in the system, or there are adverse conditions, it may be possible for the engine...

Related articles

P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
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.
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.