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Thread: The fusible link thread

  1. #101
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    Re: The fusible link thread

    Quote Originally Posted by timsrv View Post
    When the FL1.25B blows, the van will become completely dead except the charge light will illuminate.
    Tim - When I read your words in this post it was like the dark clouds broke and the sun beamed right down on me! Well, at least until I went to check the FL1.25B moments ago and quickly discovered that the FL1.25B, FL2.0L, and FL0.5G are all missing. I really hope I didn't cook anything. Any advice on what to check/replace in the case that I damaged something major?

    All - An exposed part of the alternator charging wire sparked/smoked when it got wet during a recent coolant flush, and the battery degassed a little too. Do you think I may have cooked some wire? I was thinking of replacing the section from the battery to the +box as a precautionary measure. Or maybe I'll just install the three Fusible Links and then see how she runs. Also, any FL wire pics from all your successful FL updates, in addition to Tim's within this thread, would be most helpful.
    Last edited by Mtn_Van; 03-24-2020 at 02:43 PM.

  2. 07-27-2020, 05:08 PM

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    deleted at poster's request

  3. #102
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    Re: The fusible link thread

    Quote Originally Posted by timsrv View Post
    If everything works then your FL 2.0 is good (Assuming it passes a visual test, don't waste your time trying to replace). Having a blown fusible link won't drain the battery. If anything it will prevent your battery from being drained. I'd start by recharging your battery, then check to see if there's a draw. I'm sure you're beyond this, but it's a common mistake for van newbies to not turn the ignition off all the way. Since the ignition tumblers are weak, the key can usually be removed even when its still in the accessory position.

    It's also possible the alternator may have a shorted diode. Here's a thread that may aid you in identifying and repairing a draw. Tim

    https://www.toyotavantech.com/forum/...r+draw+circuit

    tim, quoted you because it appears you’re the man with the plan. The following has nothing to do with the quote.

    New to me van. 89 2WD with 130k. When I purchased it didn’t run, start...really do anything. I put a battery in it and that got me headlights and the “charge” light on the dash, nothing else. Finally through this thread I determined the problem to be the FL 1.25B. (The FL 0.5G is broken off too but the solution to that one is straight forward...I think). Anyways, I reached under there and sure enough the 1.25 housing is completely melted and unsalvageable. Per this thread, I should replace with an 80a slow blow.

    So my question is this: exactly what style fuse and *fuse holder* would you use to do this? All I did was cut the old burned housing out so the 2 wires are still hanging down side by side. The other question is, what size wires are they that ran to the 1.25?

    thanks!

  4. #103
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    Re: The fusible link thread

    I have a 1987 van 4wd AT. A couple days ago, the 1.25B fusible link burnt for some unknown reason. I am currently in Mexico so very hard to find a replacement (or anything that would temporarly replace this until i get back to the U.S). I built a new one with a local mecanic. I should probably say that i bought the van with an ignition bypass (have to turn the key to run and push a momentary switch to start it) and have no idea why the owner before me did this. This makes that the starter is not connected to that 1.25B Fusible Link (but alternator is). Now that i got the "new" fusible link in, i noticed that one of the wires (green one. Not the white with blue line one.) gets suuuuuper hot when the van is running. Any idea why and what is causing this? I'm planning on starting my journey up north and dont want the fusible link to keep burning every once in a while... I have pictures but can't seem to understand how to put them on here

  5. #104
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    Re: The fusible link thread

    If you go back to page 1 of this thread, Tim details the green wire well.

    He also makes a note about the potential for "thermal runaways", so best to get it sorted before heading out on the road.

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