Q: What causes my positive battery terminal to turn black?

asked by on

Twice in 4 months I've had to replace my positive battery terminal because it turned black & quit

The black colored surface on the battery terminal is caused when a battery releases hydrogen as it charges and discharges. This creates a lead oxide that will eventually build up enough to create a low current path to ground that may eventually cause it not to transmit power properly. Chances are that if the terminal is turning black like this, your battery will soon be going dead as well. I would recommend having the battery tested to see if it still maintains the proper amount of power.

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. What causes my positive battery terminal to turn black?

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'm planning on buying an 1987 dodge truck as a first vehicle but I'd like to know what are the first things I should replace?

Hello, thank you for writing in. 1987 truck's by Dodge were enjoyed for decades. The truck you are looking at is going to need components specific to the condition the truck is in. If you have not already, obtain a...

Q: indicator lights on on my Dash

You may need to have the battery disconnected and reconnected to reset the computer systems in the car. The manufacturer has issued a service bulletin for your vehicle. They will be able to reset the computers for these kind of...

Q: Why won't my truck charge the battery?

Hi there. Several situations could prevent adequate charging from an otherwise healthy electrical system. These include poor connections at the batter posts, power cables at the alternator, ineffective grounding between the battery, chassis, and engine (good connections and large enough...

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...
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...
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...