Skip the auto shop - Our mechanics make house calls

Symptoms of Bad or Failing Battery Terminal Ends

Failing Battery Terminal Ends

Bad or Failing Battery Terminal Ends Inspection

by a top-rated mechanic at your home or office

Battery terminal ends serve the simple but important purpose of connecting the battery cables (and the vehicle's entire electrical system) to the battery. They are usually made of lead or another highly conductive metal that is heavy duty in nature but still offers low electrical resistance.

Since they are the first point of contact between the battery and the vehicle’s electrical system, if the battery terminals have any problems, this can affect the entire vehicle and should be serviced to restore functionality. When battery terminals do begin to fail, they will usually produce a few symptoms that can notify the driver of a potential problem.

HAVE SYMPTOMS OF CAR TROUBLE?
Get an $80 diagnostic
by a top-rated mechanic at your home or office.

Get a quote · Book an Appointment · Our expert mechanics come to you.

1. Problems starting the vehicle

Difficulty starting the vehicle is one of the first symptoms of a problem with the battery terminals. If any corrosion develops along the battery terminals, this may interfere with the connection and the vehicle may have trouble starting. This can be caused by corroded or even loose battery terminals. The vehicle may experience difficulty starting, slow cranking, or rapid clicking when the key is turned.

2. Corrosion on the battery

One of the most common symptoms of a battery terminal issue is visible corrosion. Since the terminals are in direct contact with the battery they are exposed to the acidic fumes from the battery acid and as a result are prone to developing corrosion. Corrosion can interfere with the battery terminals ability to conduct power and in severe cases can even completely block the flow. A careful inspection for any signs of powdery white or blue corrosion anywhere on the terminal or along the cable can reveal if there is a problem.

HAVE SYMPTOMS OF CAR TROUBLE?
Get your car fixed at your home or office.

Get a quote · Book an Appointment · Our expert mechanics come to you.

3. Loss of electrical power

Another common symptom of a bad battery terminal is loss of electrical power. This usually occurs when a terminal is severely corroded or has broken. A severely corroded or damaged terminal that does not make good electrical contact may cause total loss of power. Terminals corroded to this degree will usually require replacement.

While they are a very simple and inexpensive component, battery terminals do play a very important role in the overall functionality of the vehicle’s electrical system. For this reason, if you suspect that the terminal ends may be having an issue, or are showing any signs of corrosion, have a professional technician, such as one from YourMechanic inspect your battery to determine if you require a terminal ends replacement, or if another repair is more appropriate.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Still not sure about your car's issue?
Diagnose your car
What kind of issue are you experiencing?
Brakes are squeaking
Car is not starting
Car is overheating
Car is shaking (vibrating)
Fluids are leaking
Heating and A/C
Smoke or steam is coming out of the car
Warning light is on
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

More related articles

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...
Veteran and Military Driver Laws and Benefits in Idaho
The state of Idaho offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch in the...
Veteran and Military Driver Laws and Benefits in New Mexico
The state of New Mexico offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch...


Related questions

Q: Interior lights coming on when braking

You may have an issue with the drivers door switch not making proper contact, broken wires, or an alignment issue between to door and latch. A visual inspection followed possibly by removing interior panels may be required. A qualified technician,...

Q: Car will not start, unless I move the battery cables. Replaced the terminals already.

If you can move the battery cables around to get your vehicle to start, the battery cables are likely the cause of the problem. Many times, older vehicles can get corrosion on metal parts. It is possible that the battery...

Q: On occasions during quiet surrounding driving I hear a clack noise from the back of my car.

Hi there. If you are hearing a clacking sound around or near the battery in your vehicle, then this is the sign of a loose battery cable. As the cable is loose, the noise is sparks that are admitted as...