How to check if my alternator is bad

Asked by Guru9WQGJF Mar 03, 2021 at 05:55 PM about the 2004 Buick LeSabre Limited Sedan FWD

Question type: Maintenance & Repair

Battery light stay on, just put new battery in
November of 2020. My idiot light doesn't
come on, the radio where it shows it's on or
off there's nothing on that my power
windows won't work, and my security light
stays on.

2 Answers

39,730

You'll want to start the engine and open the hood. Then probe the battery terminates, both negative and positive with a multimeter set on volts. A properly charging alternator will register around 14V. Anything less than 13V is not good. With the engine off the battery should register 12 to 12.6 volts.

1 people found this helpful.

Your Answer:

LeSabre

Looking for a Used LeSabre in your area?

CarGurus has 179 nationwide LeSabre listings starting at $3,500.

ZIP:

Own this car?

Share your experience with others.

2004 Buick LeSabre

Review another car

CarGurus Experts

  • #1
    John Saffrahn
    Reputation
    4,040
  • #2
    txbarney
    Reputation
    3,160
  • #3
    joes098
    Reputation
    2,690
View All

Know more, shop wisely

Search

Related Models For Sale

Used Buick Park Avenue
44 listings starting at $2,990
Used Buick LaCrosse
108 Great Deals out of 1,604 listings starting at $1,000
Used Buick Regal
60 Great Deals out of 761 listings starting at $1,990
Used Buick Century
96 listings starting at $2,787
Used Chevrolet Impala
278 Great Deals out of 4,430 listings starting at $1,699
Used Mercury Grand Marquis
12 Great Deals out of 290 listings starting at $1,399
Used Toyota Camry
2,053 Great Deals out of 44,140 listings starting at $1,100
Used Lincoln Town Car
25 Great Deals out of 441 listings starting at $1,000
Used Lexus RX
764 Great Deals out of 16,152 listings starting at $1,250
Used Ford Crown Victoria
8 Great Deals out of 154 listings starting at $2,800
Used Toyota Corolla
1,712 Great Deals out of 26,803 listings starting at $1,500
Used Lexus LS
133 Great Deals out of 1,878 listings starting at $3,500
Used Chevrolet Silverado 1500
4,111 Great Deals out of 133,821 listings starting at $2,390
Used Ford Mustang
1,000 Great Deals out of 25,306 listings starting at $1,900

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.