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.

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?
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. Is my alternator bad or my cables?

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: I over-topped off my gas at fillups from 0 miles to about 170k miles, before realizing that it was stupid. Damage assessment?

Not much damage will result in this event. The only thing that will happen is the fuel may leak out the run off tube and cause an external leak as the little run off hose is rarely used. In that...

Q: automatic transmission works fine in reverse, 1st, and 2nd, but revs the engine in 3rd 4th 5th only goes 30mph

You could have a defective vehicle speed sensor, transmission shift solenoids, transmission control module, valve body in transmission, throttle position sensor and/or the interconnecting wiring, fuses, and terminals (involving the electrical components) could have a defect. Another possibility is an...

Q: When the car stalls it takes a few tries before starting back up

Hello. The stalling problem and starting problem are generally two separate issues but they may be related if the fault your civic has is electrical, such a bad main relay. There are a wide variety of things which can cause...

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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
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.