Skip the auto shop - Our mechanics make house calls

Q: Electrical system issues and transmission problems

asked by on

I have a high-mileage vehicle with over 230,000 miles on it and it's been having several issues lately. One of the issues is with the AC that starts blowing warm all of a sudden. After I wait about 15 seconds and restart the car, it gets back to normal. There is also this bumping noise while changing from first gear to second gear. The power windows and door locks are malfunctioning as well. All these issues disappear after the car is restarted. There are other electrical issues that wouldn't go away with the restart of the car, including the radio playing after I turn the engine off and the gauges of the instrument cluster that are not working correctly anymore. Also, after I turn the engine off completely, the radiator fan would work for several hours. Do you have any idea what the cause of these issues is? Could it be fixed? Thank you.

A: Hello. If all of these issues started at th...

Hello. If all of these issues started at the same time then it is an electrical issue. From what you are saying it sounds like you have a bad ground connection on the negative battery cable or a failing ignition switch which is causing a loss of power to these circuits. I typically check these first. If they are fine then I test each circuit as it can be a short in the fuse box or some damaged wiring. The bump that you hear is usually from the output shaft of the transmission. There is a bushing in the tailshaft that needs to be inspected for wear. It is usually the issue. If you need to have these problems checked out, consider YourMechanic, as a certified mechanic can come to your home or office to inspect the cause of the issue.

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

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: my car won't start.

Hi. It sounds like the problem is poor battery ground. If the battery doesn't have a good enough ground to the engine, the starter will not be able to pull the requires amperage from the battery to start the engine....

Q: A bad knocking noise on my left front wheel especially when driving on a bumpy road or when turning either left of right. 2008 VW Golf

Hi there - the suspension noise you describe could be either a broken front strut, or strut bearing plate. You are likely also experiencing a bit of loose motion in the steering as well. I would recommend a suspension inspection...

Q: Radiator leaking

Hello, if you have a coolant leak that drains as fast as you can fill it, then that is something that needs to diagnosed and repaired sooner than later to avoid engine damage. If you know that it is your...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...