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I HATE WIRES!

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by K30dude, Nov 1, 2001.

  1. K30dude

    K30dude Registered Member

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    Location:
    Mabank, Texas, USA.
    i burned up the fuse link on the firewall so i replaced it
    everything works now but the link gets really hot after about
    2-3 minutes. i disconnected the alternator and started the truck and the link stays cool. what the heck do i do now?
     
  2. JunkYardCrawler

    JunkYardCrawler 1/2 ton status

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    how much is your alternator putting out? it sounds like you overloading the cercut.

    Going nowhere everybody is a Moto Psycho
    Got my wheels in motion and i got a path to beat
     
  3. 1986Blazer

    1986Blazer 1/2 ton status

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    Check the amp output on the Alternator then get the correct size fusible link for that amperage..

    <a target="_blank" href=http://www.geocities.com/keywestk5/KeyWestK5.html>http://www.geocities.com/keywestk5/KeyWestK5.html</a>
    So I says to him, I said, "get your own monkey."
    1986 K5, 350 GM Crate, 700R4, NP208
     
  4. K30dude

    K30dude Registered Member

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    The alternator shows 14.4 volts on the test bench
     
  5. JunkYardCrawler

    JunkYardCrawler 1/2 ton status

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    check your conections with your alternator. look for a short to ground. the heat is caused by resistance. usely with a short.

    Going nowhere everybody is a Moto Psycho
    Got my wheels in motion and i got a path to beat
     
  6. michaelm

    michaelm 1/2 ton status

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    Amperage and Voltage are 2 distinctly different animals.
    the wire is not the problem, the short somewhere is the problem and the wire is saving you from a fire.
     
  7. K30dude

    K30dude Registered Member

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    so you don't think its the alt. overcharging?
     
  8. michaelm

    michaelm 1/2 ton status

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    not 'overcharging' but the previous replies asked how many amps it puts out.
    did you recently change to a huge power alt or is it the same old one you have had for years?
    if it is the same ole, then you have a huge draw somewhere that the 'fusible link' is stopping before it burns. you could replace the 'fusible link' with a real fuse of the same value as a stock link to make replacement easier.
    if you just dropped in a huge amp alt then you need a larger fusible link that can handle the increased heat/amperage.
    what you need to do is remove 1 wire at a time from the juntion block and measure the ?resistance? until you find the big draw then chase that wire to the problem. could be as simple as disconnect all the wires and reconnect them 1 at a time until you feel/hear the load spike. follow to next junction and repeat. the other way is way more pricey. replace fusible link with big wire and wait until whatever is FUBAR burns your truck down. not the best plan.
     
  9. K30dude

    K30dude Registered Member

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    the alt. is a 60 amper its been on the truck about 1year (rebuilt). sounds like you know what youre talking about
    thik Ill try the one wire at a time approach
     
  10. michaelm

    michaelm 1/2 ton status

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    you may get lucky and have it be as simple as rust on a connector.
    good luck
     

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