Q: Car battery is draining - 1984 Chevrolet K10

asked by on September 02, 2016

I can’t get my batteries to hold a charge on my suburban 4x4 6.21 diesel. When I jumped started the truck it ran really good. And I used 2 separate battery chargers just in case. When it’s running the voltmeter shows 15 volts. But I can’t find anything turned on that I need to turn off that causing my batteries to drain. Do you have any idea what could be causing this?

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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


Experienced Mechanic?

Earn up to $70/hr

What others are asking

I have to turn the ignition twice
Hello. It sounds like an ignition switch or starter relay problem with your vehicle. I would have a certified mechanic accurately diagnose your car's starting issue (https://www.yourmechanic.com/services/car-is-not-starting-inspection) so that you do not waste any time or money on unnecessary repairs....
Brake not working
The description given is rather vague. I'm not sure to what extent or in what way your right rear brake doesn't work. However, a brake problem that is exclusive to one wheel is usually caused by a faulty brake caliper....
Sunroof dial broken
Hi there. The sunroof module takes input from the sunroof switch and in turn, operates the sun roof motor. If the sunroof is not working, the problem is with one of these components, or there is a mechanical failure of...
Clutch problem
Hi. Clutch problems are not limited to the disc wearing out. Pressure plate, throw out bearing or hydraulic system issues could also be at fault depending on the type of problem you are having. If the clutch is slipping, then...
Replaced Clutch but still not working
Hey there, thanks for writing in about your 2004 Ford Focus. Pressure bleeding may be the only way to get all the air out of the system. The process puts pressure into the master cylinder with fluid, and pushes the...
Hardness in brake when press on pedal
Hello there, thank you for asking about your 1989 Buick Reatta. You may have more than one problem going on. Typically, a hard pedal is caused by a problem with the brake booster. If the ABS light is on, the...
After adding oil, car started jerking
I would do an oil and filter change (https://www.yourmechanic.com/services/change-oil-and-filter) and get that squared away. If the problem persists, it is definitely unrelated. Once in a pinch I had accidentally topped off 5w30 with 10w30 and did not have any problems....
Check engine light in code P0418
The air pump fuse is a 30 amp fuse that powers the pump. The "trigger" for the relay comes from the ignition switch, through a 10 amp fuse. Have you checked to see if the "trigger" wire to the relay...
Engine management light
Hello, thank you for writing in. If the code that was pulled pertained to the spark plugs and ignition system, then the issue may be related to the spark plug wires rather than the plugs themselves. Thsee can be inspected...

Related articles

How Are Car Wires Protected From Damage?
The highest tech cars can contain miles of electrical wiring. Wires must be secured and protected from heat and debris in order to work properly.
All About Car Battery Chargers
Everyone Everyone has experienced a dead car battery from time to time. It’s common occurance, especially in winter, when batteries have to work even harder to get you to where you want to go. Fortunately, there’s a solution. A portable...
The Best Used Cars to Buy If You're a Dog Trainer
If If you are a dog trainer, you expect a lot from your vehicle. You want a ride that is safe, roomy, and of course, dog friendly, since your training operation will often mean that you need to transport the...