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.

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

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: Dashboard lights gauges radio

Without knowing the exact model, it is hard to make an accurate assessment. All of the main power distribution comes through fusible links so these will need to be checked. It is possible one of these links has burned and...

Q: I have a squeaking / chipping noise coming from under the jeep at 15 mph and when I slow down adding pressure to the brakes it sto

It is not uncommon to hear a chirping, or squeaking noise, coming from the brakes. Sometimes, it is just normal for the pads to make some noise, other times it can signal that it is time for the brake pads...

Q: Car overheating after new water pump

Hello. It sounds like you may have a couple of issues going on with your vehicle. The overheating is the first concern. If it is randomly overheating then a block test needs to be done. This would indicate a leak...

Related articles

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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...