GM Truck Club
THE PREMIER CHEVY TRUCK & SUV FORUM
Founded in 2004 ~ We're the #1 Chevy Truck & SUV Forum.
Silverado & Sierra | Tahoe & Yukon | Suburban & Yukon XL | SUV & CROSSOVER
Results 1 to 3 of 3
  1. #1

    Default 2001 HD 1500 battery/charging prob

    Battery runs down over night and headlights pulse bright then dim while truck is running
    ***SON-OF-A-MECHANIC***

  2. #2
    Legend

    Join Date
    Sep 2010
    Location
    everett, massachusetts
    Posts
    1,487

    Default

    with all the connections cleaned and secure wires not corroded with the vehicle running check the voltage at the alternator output red wire. should be 14.5 volts engine on and cold. if its lower will all electrical on lights heater ac fan on high etc then the regulator in the alternator is corroded. this happen to me 3 yrs ago.

    when you replace the alternator with new or scrap yard put charger on the battery before operating .

    never purchase a re-built alternator ,as these are not good. I got the new alt with the updated alternator regulator module.

  3. #3

    Default

    X2 on the alternator.
    01' 1500 LT Z71 ECSB 5.3L
    line-x'd front brush guard with KC Daylighters, 6000k HID lows and highs, rewired highbeams, Trans-go mild shift kit, custom stainless duals, 3500 dually OEM taillights, K&N CAI. Still have OEM fender flairs and leveling kit in boxes waiting for time.


Similar Threads

  1. Service Battery Charging System
    By vernel12 in forum GM Electrical Tech
    Replies: 1
    Last: 01-15-2013, 08:04 AM
  2. Battery not charging and '03 Suburban died
    By Snoburbun in forum GM Electrical Tech
    Replies: 13
    Last: 09-09-2011, 11:17 PM
  3. Battery Not Charging
    By jcgboys7 in forum General Chevy & GM Tech Questions
    Replies: 3
    Last: 12-14-2010, 02:37 PM
  4. Replaced alternator, now i'm getting a battery not charging message WTH?
    By obie in forum General Chevy & GM Tech Questions
    Replies: 2
    Last: 03-30-2010, 08:51 PM
  5. Gauges not working- battery not charging [Expired Topic]
    By devildog29 in forum Chevy Suburban Forum (GMC Yukon XL)
    Replies: 6
    Last: 05-15-2006, 08:36 AM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •