Question about 1986 Toyota Pickup 4WD

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Blowing 80 amp fusible link for Battery.

When replacing an old battery the 80 amp fusible link for the battery was blown. The case for the link can house 2 fuses one for the battery (Top) and one for diesel (bottom). I only have the fuse for the battery since my truck isn't diesel. There are 4 wire sets two are white and connect to the left side and 2 red and blue wires on the right side. One is a single wire the other is a double wire. What I need to know is which set is bolted into the fuse itself and which is bolted into the empty fuse slot? I didn't think to look at the location of the red and blue wires coming into the right side of the link when removing the wires to replace the fuse. I have tried both locations and continue to blow the fuse. At $12.00 each it is getting very expensive.

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  • Anonymous Aug 24, 2008

    I'm having the same issue. I had just replaced my alternator since it was not charging. I had the truck running after the replacement for 20 mins. I had shut it down and after ten mins the fuse blew. I checked my connections and cleaned them. Double checked the wires for damage, none found. Everything seemed ok so i replaced the fuse without the battery terminals connected. When putting the cables on, positive first then neg, the leads sparked and the fuse blew almost instantly. Any Ideas?

  • Anonymous Mar 17, 2014

    fusible link has three wires but can only find one to connect to. Two wires have eyes and one has a clip. The link connects straight to the positive pole on the battery. There is two of them but only one blew which cut power to the motor however, we still had lights and radio etc.



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This link may help you guys. You'll have to check a few to find what you need but I suspect, if you can interpret the drawings, you'll narrow it down, otherwise take a copy to your mechanic, and it might help him.
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Posted on Nov 30, 2008


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Either the battery got hooked up backwards and there is a blown fuse or a burned fusible link, or you did not connect all the wires to the positive battery terminal (there should be three).

I'm sure that if it got hooked up backwards, you will know about it (there would have been lots of sparking going on).

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this is a little vague on what the issue actually is.. All vehicle batteries are grounded to the body on the negative side so this does not explain anything. We need to know just what the issue is, like blowing fuses or something not working.. If you mean that the battery positive was grounded and now you have lost power, look next to or mounted on the battery for a bank of large fuses or wire links called fusible links. If you have accidently shorted a positive circuit to ground the chances are that you have blown one of these fusible links. They are easily replaced. The same goes for the vehicle circuit fuses which should be checked electrically with a test probe and any found to be blown should be replaced with a fuse OF THE SAME VALUE. NEVER replace a fuse with a higher value, this presents a serious risk of fire !!!

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