FRAMING JOHN DELOREAN - ON VOD www.framingjohndeloreanfilm.com
Page 2 of 2 FirstFirst 1 2
Results 11 to 18 of 18

Thread: Voltage gauge reading low

  1. #11
    Delorean Guru
    Join Date:  May 2011

    Location:  Northern NJ

    Posts:    7,250

    My VIN:    10757

    Club(s):   (DMA)

    As long as we are talking about the inertia switch, it is a primary safety item. In addition to shutting off the fuel pump in the event of a major deceleration crash, it also unlocks the doors if your door lock circuit is hooked up and working. Make sure you have complied with SC-06-7/82 dealing with relocating the switch and installing the updated switch with a white splotch of paint. On a lot of Deloreans there were problems with the fuel pump electrical circuit. Some of the most "creative" wiring solutions seem to get employed by PO's to get the fuel pump to run. Clean the mess up and make sure it works by actually testing both the fuel pump circuit AND the door lock circuit. As for the ground, it is one of the many deficiencies in the electrical system, not having a good grounding system and undersizing the wiring. When the fuel pump starts to go bad it overloads the circuit on both sides, the feed AND the ground.
    David Teitelbaum

  2. #12
    Administrator Ron's Avatar
    Join Date:  Jun 2011

    Location:  North GA

    Posts:    4,996

    Club(s):   (SEDOC) (DCUK)

    FWIW-
    I'm not thinking Michael would be satisfied with his gauge showing 11.5 + 0.3 = 11.8V with the AC on.
    Seems using the two dedicated wires mentioned would have the highest reading available using existing switched circuits. Bitsy?


  3. #13
    Senior Member Bitsyncmaster's Avatar
    Join Date:  May 2011

    Location:  Leonardtown, MD

    Posts:    7,492

    My VIN:    03572

    Quote Originally Posted by Ron View Post
    FWIW-
    I'm not thinking Michael would be satisfied with his gauge showing 11.5 + 0.3 = 11.8V with the AC on.
    Seems using the two dedicated wires mentioned would have the highest reading available using existing switched circuits. Bitsy?

    The 12 volt side that feeds the volt gauge comes from fuse #5 so make sure that fuse is clean. It may be some added loads on that circuit also may cause a voltage drop on the plus side. My car the alternator puts out 14.6 volts and the volt gauge shows that same voltage.
    Dave M vin 03572
    http://dm-eng.weebly.com/

  4. #14
    Not a DeLorean Guru
    Join Date:  May 2011

    Location:  Rochester, NY

    Posts:    2,365

    My VIN:    01049

    Quote Originally Posted by Michael View Post
    Problem that has annoyed me for a decade. My voltage gauge always reads low. My multimeter shows my battery at 13.4-.6v at idle and around 13.2-3 with AC engaged.

    My gauge however will show about 12.7 at idle and about 11.5v with AC on. Even less with lights on etc. It's always been this way but I know my charging system is fine and I know the gauge is known to be quirky. Is there anyway to recalibrate it or even pull the needle and reposition it to a more accurate location? At this point I just may buy a new gauge unit as my temp gauge sometimes will peg and get stuck at 12 o'clock when I turn the ignition off. I know these 2 share a ground. Is it possible a corroded ground could be the culprit?
    You can fix this by doing an LS swap.
    -Mike

    My engine twists my frame.

    1981 DeLorean, Carb LS4 swap completed
    1999 Corvette, cam/headers/intake manifold, 400 rwhp
    2005 Elise, stock
    2016 Chevy Cruze

  5. #15
    AKA "The Goat" Michael's Avatar
    Join Date:  May 2011

    Posts:    3,763

    Quote Originally Posted by opethmike View Post
    You can fix this by doing an LS swap.
    But I'm not gay

  6. #16
    Not a DeLorean Guru
    Join Date:  May 2011

    Location:  Rochester, NY

    Posts:    2,365

    My VIN:    01049

    Quote Originally Posted by Michael View Post
    But I'm not gay
    Not yet...

    On an unrelated note, does this smell like chloroform to you?
    -Mike

    My engine twists my frame.

    1981 DeLorean, Carb LS4 swap completed
    1999 Corvette, cam/headers/intake manifold, 400 rwhp
    2005 Elise, stock
    2016 Chevy Cruze

  7. #17
    AKA "The Goat" Michael's Avatar
    Join Date:  May 2011

    Posts:    3,763

    Bi curious is not gay!

  8. #18
    Senior Member hippieman9's Avatar
    Join Date:  Jan 2018

    Location:  Haw River, NC

    Posts:    303

    My VIN:    06668 81' Grey interior, 5 speed, Grooved hood. Previous owner of 16301, in 2001.

    Quote Originally Posted by Michael View Post
    Problem that has annoyed me for a decade. My voltage gauge always reads low. My multimeter shows my battery at 13.4-.6v at idle and around 13.2-3 with AC engaged.

    My gauge however will show about 12.7 at idle and about 11.5v with AC on. Even less with lights on etc. It's always been this way but I know my charging system is fine and I know the gauge is known to be quirky. Is there anyway to recalibrate it or even pull the needle and reposition it to a more accurate location? At this point I just may buy a new gauge unit as my temp gauge sometimes will peg and get stuck at 12 o'clock when I turn the ignition off. I know these 2 share a ground. Is it possible a corroded ground could be the culprit?


    I am actually working on the same issue. I will be moving the ground wire from the inertia switch ground to the frame, I also replaced all the stamped "nuts" on the back of the insturment cluster with brass nuts. Seems to help the situation too. 6-32 is the size.

Page 2 of 2 FirstFirst 1 2

Posting Permissions

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