Q: I have a 2009 Scion xB and replaced the alternator. The engine is slightly shaking drove it around and the car was turning off on

asked by on July 11, 2017

Replaced the alternator on a 2009 Scion xB. There's 3 connection that go on the alternator. I noticed on the top connection that I ripped off the black wire where the black and red wire are connected. The air conditioning doesn't seem to be working and the car has a shaking when it's idling. Is this why it's shaking and how do I move forward on fixing this problem?
My car has an automatic transmission.

Car is shaking or vibrating Inspection $79.99 - $89.99 Get a Quote

Hello, thank you for writing in. As to the alternator wires, we cannot determine if they are connected correctly without an inspection. A weak electrical supply would cause the engine to run poorly. The air conditioner may or may not be related to the alternator, but they do share the drive belt as a common component. You may want to check the belt as well to make sure it is tight. If the shaking started occurring after the alternator repair, verify the belt is mounted correctly. Then verify the electrical connections and their routing. For more help contact our service department to schedule an appointment.

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

What others are asking

Rpms stay the same after letting off gas pedal

Claimed by Jeff Engstrom

Car violently shakes at 30+ mph after cold start

Hi Chris. Thanks for writing in tonight. The biggest problem with bad motor mounts is that when they fail, they tend to fail rapidly; so that might be what has happened to your Mitsubishi. However, it's also possible (although less...

Can I use an alternator from a 1997 Ford Taurus for a 1997 Ford Crown Victoria?

Hi. I do not think the alternator from the 1997 Ford Taurus will have the same mounting holes as the 1997 Ford Crown Victoria. The Ford Taurus is a six cylinder engine and the Crown Victoria is an eight cylinder...

Truck shakes and traction light coming on.

Replacing the water pump in your vehicle is quite a labor intensive job. Part of the job requires removal of the timing chain that runs the engine. If the chain is not reinstalled properly it will cause the engine to...

What Causes Leaks in a Car's AC System?

Automotive air conditioning (AC) is a closed loop system comprised of four main mechanical parts: the compressor, condenser, evaporator, and depending on system design, receiver drier or accumulator. Refrigerant is circulated through these components with the refrigerant pressure and temperature...

Dashboard vibrating when engagge into 'D' drive mode also when slowing down to stop at a red light

The vibrations you are feeling may be your brakes. If the brakes are struggling to keep the car stopped, you may feel the vibrations inside of the cab, and specifically at the brake pedal. Check your brake pads or rotors...

My Check Engine Light turns on and off, and the Service Traction Light is on

There are several components that can cause these types of symptoms. Issues that cause poor performance and shaking can be fuel, air, spark, electronic, or mechanical problems. The good news is that the Check Engine Light has come on. This...

Car shakes when pressing gas pedal

If the vibration occurs only under acceleration, the tires are not the most likely culprit. Vibration caused by tires is common. Sometimes vibration can be better or worse at certain speeds, but unaffected by acceleration or deceleration. The rear driveshaft...

Shuddering and check engine lights blink so

This may be a sign of a dirty or failing mass air flow sensor. The mass air flow sensor is a unit in the intake system that monitors air intake as it is mixed with fuel prior to being injected...

Related articles

What Sensors in the AC Tell the Car If the System Is Working or Not?
The The average car today contains a bewildering range of sensors that feed information to various computers to monitor everything from air intake to emissions and engine timing. Your car’s air conditioning system also contains a couple of sensors that...
What Sensors in the AC Tell the Car If the System Is Working or Not?
The The average car today contains a bewildering range of sensors that feed information to various computers to monitor everything from air intake to emissions and engine timing. Your car’s air conditioning system also contains a couple of sensors that...
Alternator or Car Battery: How to Tell Which Part Is the Problem
When When you need to go somewhere and your car won’t start, it’s not unreasonable to think that you could have a car charging problem. A jump start might fix it in the short term and get you to work...