Your vehicle’s battery is the lifeline. There is no a work battery, you’re no going anywhere. Which method you must regularly examine your battery’s charge to make certain it has enough juice to last you the next couple of months. Today, we’re going to show you one easy method to test her battery voltage.

You are watching: What should the battery gauge read in a truck

Fortunately, this is a fairly simple task. If you have the appropriate tools because that the job, yes no reason you can’t execute it every by yourself.

Before we StartIs the Alternator or the Battery come Blame?

If you noticing some power issues and you’re concerned about the prospect of a dice battery, friend should an initial run a pair of exam to identify whether the issue is with the battery or the charging mechanism (the alternator) before spending a great chunk of adjust on other you nothing need.

What’s an Alternator, friend Ask?

The alternator converts power from the engine into alternating electrical present for the battery, which strength the vehicle’s electrical systems. So if it seems choose your battery no working, this is the very first place you need to look.

You can examine on the wellness of her alternator in a couple of ways:

After you’ve began your vehicle, revolve on your headlights. If you find that the lights are a small dim, then that might be one indication the lights room being powered mostly by the battery. In together a case, this way there is small or no fee being produced by the alternator.With her headlights on, shot revving the engine. If her lights light brighter during the rev, it can mean that your alternator is developing some current, however not enough at idle to keep a sufficiently charged battery. Whereas if the brightness of the headlights doesn’t readjust intensity, her alternator is most most likely working smoothly.If your internal lights are progressively dimming together the automobile is running, your alternator is likely to blame.If girlfriend remember listening a slight growling sound comes from your vehicle before your things took a turn for the worse, that may be a clue the alternator is deteriorating.

Note: If you aren’t experiencing any type of of this symptoms, girlfriend should inspect your battery’s voltage.

Here space a pair of ways you deserve to test her battery voltage yourself.

Remember, black color is negative, red is positive. An extremely … important.

How to Test her Battery Voltage through a Voltmeter

A simple method for checking your battery’s voltage entails using a voltmeter, which actions the electric potential difference in between two points in an electric circuit (in crude oil layman’s terms: voltage). Us recommend girlfriend opt because that a digital voltmeter together they room much simpler to use.

For the many accurate reading, do this check twelve hours after turning off your auto to give any surface charge a chance to dissipate.

Make sure your vehicle is turn off.Check the reading. A completely charged battery will frequently display a voltmeter reading of about 12.6 come 12.8 volts. If your voltmeter is mirroring a voltage anywhere between 12.4 and 12.8, that way your battery is in great shape.Any voltage over 12.9 volts is a great indicator the your battery has too much voltage. If that’s the case, turn on the high beams to drainpipe excessive voltage surface charge. (Also, an too much charge can mean that your alternator is come blame for an over charged battery.)

How to carry out the Engine Cranking Method

Don’t eliminate your voltmeter, you’ll still require it because that this test. Also, if you don’t have actually a far starter, sit in the driver’s chair while you watch the voltmeter readings.

To examine your car battery voltage making use of the “crank” method, attach the voltmeter to your battery complying with the same measures outlined above. Next, have actually a friend crank the engine for a few seconds when you store an eye on the voltmeter. (By “crank” us mean starting your auto to energize the engine utilizing an exterior force, prefer a remote starter (not a key). The name originates from the old days, once a literal steel crank was required to manually revolve an engine on.) need to the voltage check out anything listed below 9.6 volts, that method the battery has come to be sulfated and is no longer retaining no one accepting the charge.

If girlfriend want, you deserve to take this test a small further by disabling the ignition or injection to stop your engine from starting. This will permit you come crank engine a tiny longer, however we indicate cranking no longer than 15 seconds. If she battery is effectively charged, the voltmeter should display that that maintains a voltage of 9.6 volts or higher.

See more: How Long Is The Flight From Chicago To Boston From $28, Flight Time From Chicago, Il To Boston, Ma

Other Methods

These are just two the the ways to measure your battery’s voltage, but they’re among the simplest and most price effective methods.

If you’re quiet unsure of just how things room done, or if you don’t have actually the confidence to do this yourself, remember that you can constantly book your auto for service check up at your regional Go Auto location, we would certainly be happy come help!