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I need help with the wiring on my daily driver

Discussion in '40- & 55-Series Tech' started by cavsfj40, Jan 19, 2004.

  1. cavsfj40

    cavsfj40

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    Hello all,

    I had my 2nd alt go bad and i figured oh well, it was free and old, so no biggie. I change out the alt for a remaned one and i still am getting no noticeable charging. I checked the fuse box and they are all good. The voltage reg is a new solid state model amd it worked nefore i changed that. the part i replaced it with was a 55 amp alt for a 75 (or so they told me) . It was not a direct bolt in as the ears for mounting were not at 12 and 6 oclock respectively but instead were at lik 10:45 and 6. The plug ws the same. Did they give me an internally reg'ltd alt by mistake? what should i look for to tell if it is internally regulated? Am i f'd?
    Thanks in advance.
     
  2. cruiser_guy

    cruiser_guy

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    what is the story on this friggin electrical system

    I've got a OEM altenator from a 2F manufactured 2/76. You can have it for $40 + shipping. I pulled the 2F to go to a 3B deisel.
     
  3. kevinc

    kevinc

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    what is the story on this friggin electrical system

    I have an 85 FJ60 with an internal solid state voltage regulator so some of the information i pass on might not apply to your FJ40 (though I hope it may help you). Internal regulator is obvious by having a top cover plate at about 11 oclock on the alternator with 2 phillips screws holding down the plate, the cover plate being maybe 2" x 4", and a back cover plate with 2 more phillips head screws. The regulator is secured internally with 3 more screws, and is accesible after pulling off the top and back cover plates. If your alternator fits this description I really doubt the regulator is in there. I just paid $140 for a reman alternator from Toyota and another $120 for the internal regulator being that the regulator was additional to the alt. Also on the FJ60 an internally regulated alt. has a 2 prong plug connector and 1 battery terminal screw connector on the back of the alt. The externally regulated FJ60 alt. has a 3 prong plug in connector and 1 battery terminal srew connector so I'm thinking you might not have been able to plug directly in if they gave you the wrong alternator. Does the truck stay running for a short amount of time and then die, or does it keep running but has a low voltage output from the alternator. Good luck and hope some of this helped.
     
  4. Pin_Head

    Pin_Head

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    what is the story on this friggin electrical system

    How do you know it's not charging? What is the voltage across the battery with the engine running @ 1000 RPM?
     
  5. cavsfj40

    cavsfj40

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    Re:what is the story on this friggin electrical system

    i am certain it is not charging because the voltage reg shows a deficit at all times and the lights do not do the dim at idle/bright when revve routine. they are just dim all the time. Also, the battery goes dead while i drive. I am fairly certain that there is no charge getting in. The battery is perfect and holds a charge. I think the alt is a heavy duty type that produces 50-55 amps but it is getting nowhere. I can't seem to detect any blown fuses and the fusible link is nowhere to be found.
     
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