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Thread: Alternator Normal ??

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  1. #1
    Join Date
    Mar 2002
    Location
    North Dakota
    Posts
    50

    Post

    I just noticed that when I start my truck and it's cold, meaning having to wait to start it... the alternator gauge sits at about 12 volts for approximately 20-30 seconds then climbs to it's normal operating range.

    Now if it's warm,, not sitting long, it goes right up to normal range.

    Is this normal? Seems like there is some sort of time delay restricting output when it's cold.

  2. #2
    Join Date
    Nov 2001
    Location
    Flemington,NJ, USA!!!
    Posts
    786

    Cool

    That's normal. What you are seeing is the intake air heater. It is on for around 30 seconds or so depending upon the ambient air temperature. When it is running it draws a good deal of amperage which is why the volt gauge is a little slow to recover.

    John
    VOLUNTEER FIRECHIEF "Without COURAGE, all other virtues lose their meaning" Truck Info
    indigodually@hotmail.com
    Member # 7674
    Pulling many trailers including an '03 34' Montana 5'er adapted to G/N
    Saw It ... Wanted It ... Had A Fit ... Got It...Then Sent It Back!

  3. #3
    copperhead Guest

    Wink

    That answers that, I didn't know I had and intake air heater, did notice my voltmeter running low for a short while after startup.

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