1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Wiring (rewiring) FJ40

Discussion in '40- & 55-Series Tech' started by mattcobb, Oct 29, 2003.

  1. mattcobb

    mattcobb

    Messages:
    109
    Likes Received:
    0
    Joined:
    Jul 30, 2003
    What size wire should I use to rewire my cool yet evil FJ40 (74)? I have been calling it the antichrist repeatedly but that has not seemed to solve the electrical issues. Thanks
     
  2. snelson

    snelson

    Messages:
    70
    Likes Received:
    0
    Joined:
    Sep 8, 2002
    i would say to try and rewire with the same size that you took off because different circuits call for different size wires depending on the load that they carry. there are a lot of factors to consider i.e. how long is the wire on the circuit vs how many amps it is carrying, how big is the load, what size fuse, the sizes probably range between 12-18gauge. for what is was worth that my opinion good luck ;)
     
  3. skiakhokie

    skiakhokie

    Messages:
    133
    Likes Received:
    0
    Joined:
    Jul 6, 2003
    I concur with Stretch, there are a lot of variables. Are you re-wiring the entire rig? I just finished re-wiring with a painless kit. It's not easy 1 2 3 as they say but it is something do able at home. I did mine in the parking lot at my apartment. It took about 4 or 5 good days to do.

    You can call Painless and ask for a fax of the wire identifyer for the FJ40 kit. That will show you what gauge wires they use and fuse sizes for all the circuits. Good luck. :beer:
     
  4. woody

    woody unhelpful spotter Staff Member Admin

    Messages:
    10,619
    Media:
    317
    Albums:
    7
    Likes Received:
    1,873
    Joined:
    Jan 15, 2002
    Location:
    Toquerville UT
    IMO, no smaller than 16....IIRC, most circuits on a Cruiser are run via 18 gauge, but some started-switched stuff runs as much as 12 or even 10.

    I run 6 alternator to battery (marine fine strand), 0 weld cable from starter to battery, and 0/2 (thumbsize) weld cable to the winch. Electricity runs on the surface of the wire (so I understand) so the finest strand stuff offers the least resistance. (winch/starter/alternator are the critical ones for this)
     
  5. bsilva132

    bsilva132

    Messages:
    1,011
    Media:
    5
    Albums:
    2
    Likes Received:
    7
    Joined:
    Jan 14, 2003
    Location:
    Elk Grove, Ca
    I have a painless harness (brand new) for an FJ40 for sale. I was able to work my wiring probs out so I don't need it. See the for sale section if interested.
    -Brian
     
  6. Ethan

    Ethan

    Messages:
    95
    Likes Received:
    0
    Joined:
    May 15, 2003
    Location:
    Northern California
    #14 will do just about all you want. think of a medium duty extention cord. Most medium duty will handle drills and such pretty good at 25 to 50 feet and they are 14 to 16 guage. A motor is a heavy load so in the short distance on a cruiser 14 is fine and is still small enough its not a pain to deal with. I use 14 for any fixes on my cruiser. The only time you might want to step up to a larger size is for motors and long distances. You get a big gain in just a 2 guage step. And in case some of you are wondering the smaller the number the LARGER wire size. If you plan on doing you own wiring think about the insulation. try to get thick insulation because it tends to wear off over the years on 4x4's. Use some kind of protection when going through holes. Heat shrink is a good thing to have for any kind of connection. well sorry if you knew most of this but hope it helps if you didnt. And dont let people fool you about electrical work. Its not magic. its just wires. its not that hard to work on.

    Cheers :p :beer:
     
  7. toddslater

    toddslater

    Messages:
    1,498
    Likes Received:
    3
    Joined:
    Oct 31, 2002
    Location:
    Kennett Square
    Anyone contemplating rewiring using painless or other can benefit by reading "Automotive Electrical Handbook" by Jim Horner availible at Borders or just about anywhere. Definitly worth the $15.00 price of admission.