Skip the auto shop - Our mechanics make house calls

Q: Is my alternator bad or my cables?

asked by on

The car will not keep a charge and will not start. I have replaced the battery and the starter. If I connect my battery charger to it, the lights come on , but no start. Once I take the charger off, nothing in the car works, not even the lights.

My car has 19500 miles.
My car has an automatic transmission.

A: Hello. If the vehicle is only working when ...

Hello. If the vehicle is only working when the charger is installed then there is high resistance in the vehicles electrical system. Most of the time it is caused by a bad positive battery cable. I usually do a voltage drop test of the positive and negative battery cables to make sure that they are fine. If they are then I test the resistance going to the fuse box as high resistance in that circuit will cause this also. If you are planning on having this no electrical power problem checked, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose and repair this.

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・Save up to 30%

Get a quote

What others are asking

Q: I need to know the purge valve solenoid location and how long it takes to replace it.

Hi there. There are two different locations that the purge valve was located at, depending on the vehicle type. The first location would be on the engine intake next to the throttle body on the left side when viewing the...

Q: Timing belt problem - 2004 Nissan Maxima

Actually yes it is normal. I will go through a few things that you may or may not have done and hopefully we can get your issue resolved. When you put your crankshaft pulley on did you use an impact?...

Q: Car won't start after starting minutes before, battery not dead

Firstly, remove the back seat's bottom. Then listen near the fuel pump access cover when someone cycles the key on and off. You should hear the fuel pump come on. If not then you may have a burned out fuel...

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...
How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...