Q: Alternator

asked by on

Car will not start, checked battery good. Took off arternater and had ut tested bad. Got new one and still the same. Husand said the arternater should turn without belt. He does not remember how the belt goes back on.

My car has an automatic transmission.

Your car’s alternator relies on the belt to power it so that it can generate and supply power to the battery. It will not turn on it’s own without the belt on it. You may also want to consider checking the voltage regulator which regulates the amount of power that the alternator generates and supplies to the battery. I would suggest having an expert from YourMechanic come to your home to replace your alternator and diagnose your charging system.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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: Cricket sound/like tea kettle ready to go off-kinda whistle like

Hello. Since it's not possible for me to hear the noise directly, I suggest the following to help narrow down the possibilities. Lets try to narrow down things that make the noise better/worse, or make the noise move. Different problems...

Q: Cooling fan not coming on

The electric radiator cooling fans are powered through relays, a fuse, and a temperature switch. The fan motors themselves should be tested (the fan motors can be independently powered, on or off the car, to see if they work properly)...

Q: transmission

This could be a lack of vacuum or potentially a bad shift solenoid. Most modern transmissions operate on vacuum actuated controls and solenoids both of which commonly fail at times which will cause the lack of or intermittent shifting problem...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...
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.