Smoking battery cables?

Discussion in '40- & 55-Series Tech' started by Waterboy, Dec 10, 2010.

  1. Waterboy

    Waterboy SILVER Star

    Messages:
    831
    Location:
    Boca Raton, Florida
    Watch out newbie here. I have a 1970 FJ40 with a 1/75 2F. I have learned a lot from this web site but I have to admit when it comes to wiring I am at a lose. I believe I have everything hooked up right (well till I tried to start it and the battery cables started to smoke). The motor does turn over and the starter does not get blazing hot, only the battery cables. I have spent a lot of time trying to figure this out, but know Im at witts end. Time to resort to my Landcruiser Family. Please help...:hmm:

    [​IMG]

    [​IMG]

    [​IMG]

    If more info or better pics are required please let me know. :hillbilly:
  2. lostmarbles

    lostmarbles SILVER Star

    Messages:
    7,322
    Location:
    New Zealand
    Is your battery connected the right way around? (Negative to earth/chassis/body?)
  3. Poser

    Poser Oh...Durka Durka Durka. s-Moderator Supporting Vendor

    Messages:
    19,693
    Location:
    MN
    Your battery cables are JUNK!


    Replace them.
  4. Waterboy

    Waterboy SILVER Star

    Messages:
    831
    Location:
    Boca Raton, Florida
    The negative is connected to alternator bracket (green cable in pic). This is how the previous owner had it wired. If this is incorrect please let me know. I also have no idea how long the truck has sat. Ive had it about a year, but started with the frame an working my way up. All filters and fluids have been changed.

    Consider it done Poser.
  5. cjgoode

    cjgoode

    Messages:
    3,023
    Location:
    New Smyrna Beach FL
    I would also pull the starter motor and test it. It could be frozen or shorted causing the cables to overheat. Since you said the you do not know how long it has been sitting, I assume you have never had the starter motor turn over.

    I pulled my starter and refreshed it recently. It had been sitting for over 7 years is my guess. the part that slides to engage the fears was stuffed with straw and cloth. I guess mice had climbed into the timing hole and made some nests. It actually worked before I pulled it, but very intermittently.
  6. Poser

    Poser Oh...Durka Durka Durka. s-Moderator Supporting Vendor

    Messages:
    19,693
    Location:
    MN
    That is not an uncommon ground connection point, but you want to make sure that you have a ground strap between the frame and engine as well as a connection between the negative at the battery and the engine.

    Your ground cable seems larger than the positive. When you purchase replacement cables, see if you can get positive and negative cables the same wire size as the current ground.

    Clean any corrosion where these cables attach; corrosion will create resistance to current flow. Resistance creates heat and heat can damage electrical components.
    Positive lug on the starter solenoid, ground attachment point on the engine and any other connections need to be clean to make solid contact.
  7. surfpig

    surfpig The Anti-Tech SILVER Star

    Messages:
    1,811
    Location:
    Cowtown
    I wouldn't recommend it.

    :D

    I see lots of wire splices in the few pictures you posted...

    Good luck.
    Last edited: Dec 10, 2010
  8. Waterboy

    Waterboy SILVER Star

    Messages:
    831
    Location:
    Boca Raton, Florida
    The motor turns over with no problems. I dont have spark but I would like to figure out the smoking battery cables first.

    Poser: A friend of mine said the same thing about a grounding strap from the engine to the frame. I gave it a quick glance and didnt see anything. Any suggestions on where the stock one would have been located?
  9. Poser

    Poser Oh...Durka Durka Durka. s-Moderator Supporting Vendor

    Messages:
    19,693
    Location:
    MN
    IIRC, the ground strap ran from the bottom bolt of the starter motor over to the frame, attaching where a brake line junction secures to the frame as well.



    It is the black wire with a yellow stripe in the first picture...
  10. CruisinMT

    CruisinMT

    Messages:
    2,262
    Location:
    Montana
    bolt your coil up dude, you dont want that bouncing around.
  11. cjgoode

    cjgoode

    Messages:
    3,023
    Location:
    New Smyrna Beach FL
    Does the engine turn over with the starter motor or by hand. You said the starter does not. If the starter is turning the motor over not as much to worry about, but if the starter does not turn the motor over it could be a major short with no fuse to blow, or a major load if the motor is not shorted but frozen. If the starter motor has problems it will smoke new cables as well. You definitely need new cables that is clear.

  12. Waterboy

    Waterboy SILVER Star

    Messages:
    831
    Location:
    Boca Raton, Florida
    Poser: I have that one and actually did have to clean it up quite a bit. It should have a good ground know but I will take a pic tomorrow to get your opinion.

    The starter motor is good to go. It has no problem turning over. If you guys think its necessary I will take it out and test it. Sorry for any confusion. The coil is stitting that way so I could make sure i had the positive and negative wired right.
  13. cjgoode

    cjgoode

    Messages:
    3,023
    Location:
    New Smyrna Beach FL
    No need to pull the starter, I wanted to make sure it was turning over.
  14. Poser

    Poser Oh...Durka Durka Durka. s-Moderator Supporting Vendor

    Messages:
    19,693
    Location:
    MN
    Motors are electric.


    The Land Cruiser has and internal combustion engine.

    :beer:
  15. 3_puppies

    3_puppies SILVER Star

    Messages:
    7,108
    Location:
    Helena MT
    I get strange looks when I explain that to people.:meh:
  16. bsmith123

    bsmith123

    Messages:
    3,079
    Location:
    Norfolk United Kingdom
    grounds

    You could put that neg cable straight to the frame below the battery

    that's just a pref I have

    and def run a good ground to the engine as said

    dont need to repeat it all but if you do clean it all up and tighten it up good I bet that motor will start that engine :grinpimp:

    little dab of vaseline or dielectric grease wouldnt hurt

    look for green coming out of the cables or any bulges in the cables or excessive stiffness in the cable----all signs of corrosion inside the insulation---I've cut some open and found some real messes
  17. Rockets2000

    Rockets2000 Space Cadet SILVER Star

    Messages:
    588
    Location:
    Houston, TX
    There are also rocket motors, which are chemical. ;)
  18. Poser

    Poser Oh...Durka Durka Durka. s-Moderator Supporting Vendor

    Messages:
    19,693
    Location:
    MN



    Crazy...

    Google rocket motor and what is the first thing that comes up?


    :lol:
  19. lostmarbles

    lostmarbles SILVER Star

    Messages:
    7,322
    Location:
    New Zealand
    MotorVersusEngine.jpg

    Choose whichever term you want to use. (Motor or Engine.) It is just "personal preference".

    :cheers:
    MotorVersusEngine.jpg
  20. Rockets2000

    Rockets2000 Space Cadet SILVER Star

    Messages:
    588
    Location:
    Houston, TX
    Last edited: Dec 10, 2010

Share This Page