Results 1 to 8 of 8

low voltmeter

This is a discussion on low voltmeter within the General Help forums, part of the LSx Technical Help Section category; volt gauge drops crazy. below the yellow. tried new alternator...nothing. got my stock one tested. it was fine. replaced and ...

  1. #1
    Junior Member LUV2SK8TE17's Avatar
    Join Date
    Apr 2006
    Location
    houston
    Age
    30
    Posts
    61

    low voltmeter

    volt gauge drops crazy. below the yellow. tried new alternator...nothing. got my stock one tested. it was fine. replaced and checked all connections and checked for corrosion. nada..out of ideas....even have new batt....also took off all extra stuff like nitrous connections and amp...any help would be awsum..thanx guys

  2. #2
    Senior Member ss~zoso~ss's Avatar
    Join Date
    Dec 2004
    Location
    )
    Posts
    9,128

    SS: NBM, tan top
    1998-SS, 2010 Jetta TDI

    could be the gauge? do your lights dim and such?

  3. #3
    Member jag42420's Avatar
    Join Date
    Aug 2006
    Location
    Kentucky
    Age
    43
    Posts
    525

    Silver
    2002 WS6 Trans Am

    Start the car, disconnect the battery, turn on the headlights and AC. If it runs fine it's probably your gage.

  4. #4
    Senior Member Danger731's Avatar
    Join Date
    Aug 2000
    Location
    Indy
    Posts
    6,712
    Disconnecting the battery on a running car is a no no. That was true for 70's vehicles but not today.

  5. #5
    Member jag42420's Avatar
    Join Date
    Aug 2006
    Location
    Kentucky
    Age
    43
    Posts
    525

    Silver
    2002 WS6 Trans Am

    Why's that? I've been doing it for years without any issues. How's it any different than running one with a bad battery? It only takes a couple seconds to know for sure. Can't see irrepairable damages in under 30 seconds. Voltage spikes could cause damage if ran for an extended timeframe, but the car will die almost immediately if the charging circuit is bad. There would be minimal to no change in idle if it is good, and you'd know it is a bad gage.
    Last edited by jag42420; 10-05-2007 at 09:01 AM.

  6. #6
    Junior Member LUV2SK8TE17's Avatar
    Join Date
    Apr 2006
    Location
    houston
    Age
    30
    Posts
    61
    the car really does run off the alternator anyway...bat is only used in start so maybe not a bad test. the voltmeter test only shows 12.1 v wile engine is running. no surge in power just loss in voltage slowly. pretty sure the gauge is ok cuz wen it reads dead my car wont start and matches what the voltmeter said wen tested. guess my only hope is to trace thru wires and find a dead spot wich i heard of today from a friend. thanx 4 inputs

  7. #7
    Junior Member LUV2SK8TE17's Avatar
    Join Date
    Apr 2006
    Location
    houston
    Age
    30
    Posts
    61
    so i replaced the "excitor wire".now voltmeter is fine once i start up. but when i take off the e-brake & hit the brakes it drops down 2 yellow. when a/c/ comes on its even worse....any guesses now? thanx

  8. #8
    Junior Member LUV2SK8TE17's Avatar
    Join Date
    Apr 2006
    Location
    houston
    Age
    30
    Posts
    61
    guess the batt has to charge. works fine now. so i recommend chekin that excitor wire. the little red one

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. voltmeter
    By Valor X in forum General Help
    Replies: 5
    Last Post: 01-16-2013, 06:30 AM
  2. speedometer, voltmeter, temperature gauges
    By leon phelps in forum LSx Retrofit and Swap
    Replies: 3
    Last Post: 05-22-2012, 03:26 PM
  3. 2 5/8 Guages OP, Fuel level, water temp, voltmeter
    By ksstamp09 in forum Parts Wanted / Trade
    Replies: 3
    Last Post: 06-11-2009, 10:43 AM
  4. Voltmeter fluctuates, why?
    By jimimiller in forum General Help
    Replies: 1
    Last Post: 08-04-2007, 04:37 AM
  5. Autometer Cobalt A/f, Voltmeter Gauges
    By blackbird04 in forum Parts For Sale / Trade
    Replies: 0
    Last Post: 02-07-2007, 07:45 AM

Bookmarks

Posting Permissions

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