what does it mean when my alternator squeals and when I take the positive wire off it stops squealing?

Asked by Jun 09, 2015 at 08:07 AM about the 2001 Pontiac Grand Am SE

Question type: Maintenance & Repair

2 Answers

109,965

Please tell you didn't take the positive cable off with the engine running, cause if you did the chances of damaging the vehicles electronics just skyrocketed. Now to your problem, first check the belt and the tension, if the belt is frayed or cracked replace it, if it is loose then the tensioner is going bad, fairly common problem, if that checks good then make sure of the pulley alignment is correct, if all of that is good then get a mechanics stethoscope and try to pinpoint the exact location of the noise, it could be an idler or even the alternator itself. Make sure your battery and charging system are up to the job, might get them tested.

21,130

I agree with tennisshoes do not remove positive terminal when vehicle is running can mess up computer it's not like in the older vehicles that do not have computers you can test those vehicles that way. To check to hear if alternator bearing are bad with belt off give alternator pulley a spin with your hand should make noise if bearings are bad. Check other pulleys the same way by giving them a spin.

Your Answer

Pontiac Grand Am Experts

  • #1
    tenspeed
    Reputation
    8,000
  • #2
    John Saffrahn
    Reputation
    1,630
  • #3
    Tom Demyan
    Reputation
    1,620
View All

Related Models For Sale

Used Pontiac Grand Prix
8 Great Deals out of 2,418 listings starting at $1,900
Used Pontiac Firebird
6 Great Deals out of 690 listings starting at $3,911
Used Ford Mustang
348 Great Deals out of 41,846 listings starting at $1,488
Used Chevrolet Camaro
389 Great Deals out of 31,491 listings starting at $3,000
Used Chevrolet Impala
503 Great Deals out of 32,102 listings starting at $1,000
Used Chevrolet Malibu
1,008 Great Deals out of 53,938 listings starting at $1,599
Used Pontiac Bonneville
4 Great Deals out of 406 listings starting at $1,995
Used Toyota Camry
1,125 Great Deals out of 76,738 listings starting at $1,100
Used Honda Civic
601 Great Deals out of 52,409 listings starting at $999
Used Honda Accord
801 Great Deals out of 89,314 listings starting at $1,444

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.