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Gen Light

Discussion in '308/328' started by FourCam, Aug 26, 2008.

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  1. FourCam

    FourCam Formula Junior

    May 19, 2004
    411
    Greeley, Colorado
    Full Name:
    Cameron MacArthur
    #1 FourCam, Aug 26, 2008
    Anyone have any experience with the Alternater/Generator light glowing when using turn signals and/or the brakes??? I just noticed this during an evening drive--headlights were off, no other known draw on the electrical system. I have not installed Kermits' fuse panel, BTW. Thoughts???
     
  2. BigTex

    BigTex Seven Time F1 World Champ
    Owner Rossa Subscribed

    Dec 6, 2002
    79,406
    Houston, Texas
    Full Name:
    Bubba
    #2 BigTex, Aug 26, 2008
    Birdman's fuse panel.....Kermit is long gone.....


    One some of my 308s I notice the turn signals generating a dim pulse when in use at night, usually the headlights are up though.

    You have to recall this is an over/under voltage measurement, while it may indicate a failing alternator I think it is pretty much normal, if your battery stays up all is well....
     
  3. FourCam

    FourCam Formula Junior

    May 19, 2004
    411
    Greeley, Colorado
    Full Name:
    Cameron MacArthur
    #3 FourCam, Aug 27, 2008
    Thanks, Tex; no offense meant to anyone on the fuse panel. Battery seems to stay charged ok; but maybe it's time to think about a rebuild on the alternator and do the fuse panel as well. I think I've been dreading that under-car operation long enough...
     
  4. kerrari

    kerrari Two Time F1 World Champ

    Oct 22, 2004
    24,054
    Coolum Beach AUSTRALIA
    Full Name:
    Karen H.
    #4 kerrari, Aug 27, 2008
    I've noticed I get some 'backlighting' of my gen light at night when the instrument lights are turned on; makes it seem like the gen light is glowing a little.
     
  5. Darolls

    Darolls F1 Veteran
    BANNED

    Jul 2, 2003
    7,782
    Full Name:
    Sparky
    #5 Darolls, Aug 27, 2008
    Before you do anything, check for good grounds.
     
  6. maurice70

    maurice70 F1 Rookie

    Jan 25, 2004
    4,334
    Sydney
    Full Name:
    maurice T
    #6 maurice70, Aug 28, 2008
    Same here.With the headlights on and appyling the brakes I get a dim glow
     
  7. bowserrh

    bowserrh Rookie

    Oct 16, 2007
    27
    Poway, CA
    Full Name:
    Robert Bowser
    #7 bowserrh, Aug 30, 2008
    I believe the GEN light on a 308 will light up for current flow in either direction. It normally goes on for current flow from the battery into the alternator circuit, but also is subject to lighting up due to small voltage differences in the opposite direction. Mine would glow softly at night even while driving on the freeway. I traced it down to resistance in the ignition switch. When the lights were on, there would be a voltage difference between the switched and unswitched sides of the circuit. I fixed mine by adding an ignition relay to drive all the switched circuits. Now my GEN light stays dark when it is supposed to.
     

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