1999 chevy K150 suburban electrical problems charging sys...

Q: 1999 chevy K150 suburban electrical problems

asked by on May 18, 2017

My 1999 chevy k1500 suburban is acting up. Locks seem like they dont have enough power to lock or unlock. I hear the clicking under the dash from what I assume is the relay. The 2 12v power outlets are also acting weird. They have power but the power seems to be "pulsating". I put a usb charger in it, without anything charging, and the green power light on it goes bright/dim quickly and makes what I can describe as an electrical sound. The 4x4 button too. Only lights up half way, half the time. Always let's me switch wheel, just doesn't light up all the way. Same with ac/heat controls. The left side of the cluster is really dim, and matches the rear controls on the head liner in the front. What can I do to determine the problem?

My car has 181000 miles.
My car has an automatic transmission.

Hello, thank you for writing in. There are several components that will attribute to electrical issues like this. Generally speaking, when you have issues with several electrical systems at once, and not just one or the other, the charging system is to blame because it effects all systems. With that being said, start by testing the battery and the alternator. Both can be tested in car with a voltmeter, or at your local parts store if removed from the vehicle. You may also want to check into the battery cables, alternator connections, and wires feeding the fuse box. Make sure they are all clean, dry, and tight. For more help with diagnostics and repairs, contact our service department to schedule an appointment.

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

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

Blinker flashes as if I have a bulb out

The problem is in the turn signal switch. The switch may be shorting out to the other circuits when you put the switch to the left. I recommend replacing the turn signal switch. As some vehicles that have an air...

My odometer is out on my car. How do I find out how many miles is on it?

Hi Jasmine. Thanks for contacting us today. On a digital speedometer, the mileage is stored in the ECU and simply displayed on the gauge. By having the speedometer fixed, the milage should appear on the dash. You can set up...

Drive belt loose and power steering not working.

Hello, thank you for writing in. The vehicle's drive belt is kept tight with an "auto-tensioner". This may be the pulley that has "popped" and released the tension. If that was the case, you would likely notice more issues than...

Related articles

How Does a Mechanic Check a Car Alternator's Volt Output?
Have Have you ever wondered how a mechanic checks your alternator? It’s not something that has to be done all that often, because usually alternators are maintenance-free, and they can last for up to 12 years without needing repairs. When...
How Can I Prevent My Car Battery From Dying?
Your Your car battery is one of the most important parts of your car’s electrical system. Without the battery, your car simply isn’t going to work. Your battery works hard, and eventually, it’s going to wear out. So, how long...
How to Deal With a Dead Battery
If your battery appears to be dead, try a few steps to start your car before determining if it needs to be replaced or towed.