Q: Charging System Failure and Battery Light on

asked by on February 06, 2017

I was trying to jump start my 05 Buick Terraza V6 .5L automatic front wheel drive van and i didnt know that the jump start assist thats connected to the fuse box was suppost a positive terminal and i was trying to connect the negative cable to it, and it shot my starter. So i changed it and a couple of days later the "Charging System Failure" appeared on the dashboard. I changed the Alternator and Battery, but it is still not charging the battery. I changed the alternator and battery multiple times and still "charging system failure" appears. I checked all the fuses under the hood and the fuses on passenger side and all are in good condition. what could be the problem?

My car has 180000 miles.
My car has an automatic transmission.

Battery will not hold a charge Inspection $79.99 - $89.99 Get a Quote

Hi There, It sounds like you may have a voltage regulator issue that might not be allowing the alternator to charge the battery sufficiently. The voltage regulator could be allowing the alternator to supply too much or too little amperage to the battery resulting in the battery never maintaining a consistent charge as it is designed to. The voltage regulator is a unit that regulates the charging of the battery by the alternator. When the voltage regulator is not working properly, this may result in the alternator allowing too much power to be delivered to the battery resulting in damaging wires and prematurely sometimes destroying the battery. A common sign of this is usually the acid inside the battery boiling causing the battery to swell. You may also smell a bit of smoke due to things potentially getting too hot. In other cases it may result in the alternator not supplying enough power to the battery, resulting in undercharging the battery or not charging it at all. I would recommend having an expert from YourMechanic come to your location to diagnose your vehicle’s charging system.

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

What others are asking

2002 odessey running thru 5 quarts of oil a day tachometer stopped working and now engine light oil light traction control light.

If the oil is not running out under the car, it has to be going somewhere, and that somewhere is most likely out the tailpipe. But 5 quarts a day would produce such clouds of smoke that you wouldn't be...

Wheel alignment necessary

Any time a component of the steering or suspension is replaced, then the front end should be aligned. I would say yes.

Car making noise when turning.

Hello, without hearing the noise, lets start with the two most common causes. If it is a moaning or groan type of noise, the first thing to be check is the level of the power steering fluid. If the fluid...

Dome lights and courtesy lights in back seat will not turn on.

Hi there. When multiple objects in a car will not work that are electrical, then there is a loose or broken ground wire to the circuits. Check all of the wiring in the cab to see what could be loose...

Power steering wheel too hard to turn

If your steering wheel has suddenly become hard to turn, and a leak has appeared underneath your vehicle, it is very possible that it your power steering fluid has leaked, and has made your steering wheel hard to turn. Power...

2003 Acura MDX. The dealership says the oil pump seal is leaking, only 3/4 qt. of oil in the engine w/no leaks under the car...

Hi Stan. Thanks for submitting the question. If an oil seal is damaged, the engine will lose a lot of oil over an extended period of time, but will not always leak on the ground. The ticking noise is commonly...

My radiator is spitting out coolant onto my engine and the check engine light is on but no overheating and its sometimes dont want to start should I get a new radiator

Hi there: Before you decide to purchase a new radiator and have a new radiator installed on your 2005 Nissan Murano, I'd recommend having a professional mechanic complete a car is leaking coolant inspection first. This will allow them to...

I have a loss of power and I can't really press on the gas too hard or the engine will start shaking/stalling

The engine may have a vacuum leak in the throttle intake tube between the mass air flow sensor and the throttle body. Or the mass air flow sensor may not be working correctly or is contaminated. Have the computer scanned...

I replace the thermostat and was told to drive it for engine light to go out but its still on after 5 days what can i do?

Anytime a vehicle repair is performed to remedy faults that arise from a check engine light (CEL) diagnostic, at the conclusion of the repair, a professional mechanic uses an appropriate scan tool to turn OFF the check engine light. The...

Related articles

Understanding the Buick Oil Life System and Service Indicator Lights
Car symbols, or dashboard lights, are a car service reminder. The Buick Oil Life System indicates when and what service your car needs.
A Buyer’s Guide to the 2012 Buick LaCrosse
Over Over the past several years, Buick has returned to form when it comes to luxury sedans, and the 2012 Buick LaCrosse is a standout even when compared to some of the other big names in luxury. Key Features The...
A Buyer’s Guide to the 2012 Buick Verano
The The 2012 Buick Verano is a near luxury sedan that is affordably priced with lots of technology and comfort that comes standard. The interior is covered in leather with a rich variety of colors. The legroom in the front...