voltage question
Cadillac
 

Cadillac Forums | Help Us Help You | Advertise | Cadillac Parts | Cadillac News | Cadillac Classifieds / (Old System)

Cadillac Technical Archive | Cadillac Dealers | Cadillac Reviews | Cadillac Dealer Reviews | Cadillac Vendors

CadillacForums.com is the premier Cadillac Forum on the internet. Registered Users do not see the above ads.
+ Reply to Thread
Results 1 to 5 of 5
Northstar Engines and System Technical Discussion Discussion, voltage question in Cadillac Engine Technical Discussion; dashboard info shows 13.5 volts while driving but quickly drops to around 12 at idle...
  1. #1
    ppsager is offline Cadillac Owners Member
    Automobile(s): 98 deville
    Join Date
    Jul 2013
    Age
    53
    Posts
    1

    voltage question

    dashboard info shows 13.5 volts while driving but quickly drops to around 12 at idle

  2. Remove Advertisements
    CadillacForums.com
    Advertisements
     

  3. #2
    Submariner409's Avatar
    Submariner409 is offline If it won't run, chrome it
    Automobile(s): 2002.5 F55 STS/65500mi, 2004 Ford F150 SuperCab4x4
    Join Date
    Feb 2006
    Location
    MD Eastern Shore - Kent Island
    Age
    75
    Posts
    46,060

    Re: voltage question

    No good.

    DIC should show 14.2 - 14.6 at speed, maybe 13.8 stopped with loads on.

    Cables; how old is the battery ?? (Any more that 6 years old, the battery is suspect, as is the voltage regulator - inside the alternator)

    Battery voltage chart - battery completely disconnected and left to sit for at least 1/2 hour.

  4. #3
    maeng9981's Avatar
    maeng9981 is offline Cadillac Owners Connoisseur
    Automobile(s): 14 SRX, 12 Sierra, 00 SLS, 99 Deville 50-year Anniversary
    Join Date
    Mar 2009
    Location
    Dallas, TX
    Age
    23
    Posts
    3,299

    Re: voltage question

    My alternator did this before it died. If you have a healthy battery, it might be on its last legs, especially considering age and mileage of these vehicles.

  5. #4
    04GrandAmGT's Avatar
    04GrandAmGT is offline Cadillac Owners Fanatic
    Automobile(s): 2001 DTS, 04 Grand Am GT,07 Cobalt(Dont Judge,My fuel Saver)
    Join Date
    Oct 2012
    Location
    Manitoba, Canada
    Posts
    375

    Re: voltage question

    Yes i agree with maeng9981, i Drove jake 97 eldo, and he had an aftermarket alternator, and if you didnt shoot the rpms to 5000 as soon as you fired it up it wouldnt charge at all! even driving on the highway all of a sudden everything gets dim check your voltage and was about 12.1, throw it in neutral and shoot it to 5000 again and you were good to go for a little while, if you can spare the extra money get a Factory Replacement! its worth every penny seeing as it is about a 1-2 hour job for a novice northstar mechanic.

  6. #5
    tateos's Avatar
    tateos is offline Cadillac Owners Connoisseur
    Automobile(s): 1997 ETC (GAVE TO STEPSON 2011), 2000 DTS (RIP)
    Join Date
    Jul 2007
    Location
    FOUNTAIN HILLS, AZ
    Age
    58
    Posts
    1,711

    Re: voltage question

    Also check the main "hot" connection at the alternator

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.
If you do not want to register, fill this field only and the name will be used as user name for your post.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself.

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Bookmarks

Cadillac Posting Rules

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts
Read about Lincoln | Buick | Kia Forte Forum
Need products for your Cadillac? Check out your options at the links below:

custom floor mats | Cadillac Chrome and Black Chrome Wheels | window tinting