Q: changed altenator, still no power going to battery

asked by on

installed new altentaor but still have no power going to battery

If the alternator is "new", and thus presumably good, the vehicle engine is running, the alternator drive belt is appropriately tightened, and yet you are not getting around 14.5 volts of charging current at the battery posts, that means there is an open in the charging circuit between the alternator and the battery. That open could be due to a bad fuse, corroded terminals or wiring, a wire break, or other circuit fault. To resolve this, the recommended service is a battery is not charging diagnostic. If you request that diagnostic, a certified mechanic will come to your location, identify the fault and estimate the repair. Please let us know if you have additional concerns or follow up questions.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. changed altenator, still no power going to battery

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 has been having issues staring I turn the key and no clicking or sound happens lights still work and I know not battery

There are several issues that could possibly cause this issue. A bad connection, a failed starter (or starter solenoid), a bad relay, or any number of other possibilities. It would be best to have a certified mechanic do some diagnostic...

Q: When my van sits overnight it won't start until I jump it.

Check the battery for any parasitic load applying to it. To do this, make sure that the battery is fully charged and remove the negative battery cable from the battery. Then put a digital meter cables on the negative battery...

Q: Do wiring harnesses need to be replaced?

As automotive electrical systems increase with each model year, so does the amount of wiring required to operate them. BMW says their current models can contain up to a mile of wires weighing as much as 130lbs! All of this...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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.