1. Welcome to Tacoma World!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all Tacoma discussion topics
    • Communicate privately with other Tacoma owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

Wiring HO alternator/ alternator fuse?

Discussion in '2nd Gen. Tacomas (2005-2015)' started by craigFLA, Jun 27, 2010.

  1. Jun 27, 2010 at 7:41 AM
    #1
    craigFLA

    craigFLA [OP] Well-Known Member

    Joined:
    Oct 6, 2007
    Member:
    #2944
    Messages:
    420
    Gender:
    Male
    Ft. Lauderdale, Florida
    Vehicle:
    Tacoma TRD Sport Pkg.#1, XSP Package
    Leather, 20" rims, Borla cat-back exhaust, running boards, back up camera/3" screen in rear view mirror, carbon fiber interior trim. Tow Package. MODS: URD intake BHLM. Tinted tails & 3rd brake light Fog Light mod. 5pc Grill Craft (High Gloss Black powder-coat) T-Rex eye-lids AVS Wind Deflectors 3M Window Tint 15 front/30 rear OBX Sports Pedals Viper 5901 / remote start Pioneer AVIC F90BT-NAV Hybrid L8's in doors, L4's and Dynaudio MD102 tweets in custom kicks, morel rear-fill, JL TW5-13" sub, JBL MS-8, 2@Tru B475, Tru 4.65, PPI a600.2, PPI 456 X-over, Raamat BX2 and ensolite. relocated rear seats 3/4" Retrax cover electric dual "dead-bolt-lock" electric tailgate lock. electric Dynalock for Retrax Cover/custom fabricated case. kinetik second battery/power-gate isolation. Powerslot Cryogenic rotors, Hawks HPS Pads, SS lines,painted calipers&drums FULL trans flush mod OE Denso plugs
    I have been in research mode for several days.

    Due to audio system demands, I will be re-installing my OEM battery (maybe later upgrading to an Optima), and installing my Kinetic battery with an isolator for audio system use.

    I have been researching HO alternators, and although its super expensive, have settled on the DC Power 250 amp.

    https://www.dcpowerinc.com/alternators/toyota/2004-2010-toyota-4l-v6-250-amp-alternator.html


    Also been looking at this isolator:

    http://www.perfectswitch.com/power-gate/battery-discharge-controllers/dual-rectifier-isolator/

    NOW...my issue:

    The factory alternator lead goes to the fuse box, then to the bat +. After pulling out my 4 volume Tacoma Manual set and reading, it appears there is a 140 amp fuse (i have the 130 amp tow package) inside the fuse box.

    Will I need to upgrade this fuse to accomodate a 250 amp alternator? I assume the alternator lead to fuse box must remain (I already changed it out to 0 gauge) as this is how the fusebox/truck receives power...correct?

    There is alot of info on various sites regarding dual battery installs and alternator upgrades...but have found nothing regarding this topic anywhere.

    Any help on this would be greatly appreciated!
     
  2. Jun 27, 2010 at 2:10 PM
    #2
    craigFLA

    craigFLA [OP] Well-Known Member

    Joined:
    Oct 6, 2007
    Member:
    #2944
    Messages:
    420
    Gender:
    Male
    Ft. Lauderdale, Florida
    Vehicle:
    Tacoma TRD Sport Pkg.#1, XSP Package
    Leather, 20" rims, Borla cat-back exhaust, running boards, back up camera/3" screen in rear view mirror, carbon fiber interior trim. Tow Package. MODS: URD intake BHLM. Tinted tails & 3rd brake light Fog Light mod. 5pc Grill Craft (High Gloss Black powder-coat) T-Rex eye-lids AVS Wind Deflectors 3M Window Tint 15 front/30 rear OBX Sports Pedals Viper 5901 / remote start Pioneer AVIC F90BT-NAV Hybrid L8's in doors, L4's and Dynaudio MD102 tweets in custom kicks, morel rear-fill, JL TW5-13" sub, JBL MS-8, 2@Tru B475, Tru 4.65, PPI a600.2, PPI 456 X-over, Raamat BX2 and ensolite. relocated rear seats 3/4" Retrax cover electric dual "dead-bolt-lock" electric tailgate lock. electric Dynalock for Retrax Cover/custom fabricated case. kinetik second battery/power-gate isolation. Powerslot Cryogenic rotors, Hawks HPS Pads, SS lines,painted calipers&drums FULL trans flush mod OE Denso plugs
    It has been suggested that I run my upgraded 0 gauge from the fusebox to the battery isolator...then ALSO run a direct 0 gauge (fused) from the alternator direct to the isolator.

    This may work, as the current would be divided between the 2 wires, but doesnt seem ideal really.

    Can I bypass the fusebox all together and go straight from the alt to the isolator or is the fusebox required to receive power through that circuit?

    Could really use some help from someone who has upgraded to a HO alternator...someone with practical experience.

    Thanks again.
     
  3. Feb 5, 2011 at 7:37 PM
    #3
    Skillet

    Skillet Well-Known Member

    Joined:
    Jan 18, 2011
    Member:
    #49503
    Messages:
    45
    Gender:
    Male
    First Name:
    Caleb
    Palmdale,Ca
    Vehicle:
    99 tacoma prerunner 3.4 auto trans trd,
    Trd edition,black powdercoated wheels,king Coils front, king double bypass rear, k&n cai, jba headers,borla exhuast,optima batt,xenon hid,crystal headlights,rewired entire car to four guage wiring on big stuff alt starter etc.,alpine screen,focal honeycomb components,JL four channel amp,dynamated entire inside of truck and hoodliner,limo tint all rear windows,LEDs everywhere possible dome light, tails,fronts,04 tailights,
    I have that alt you are talking bout and an optima yellow. I like to run 0 gauge from the DC power alt to a Rockford fosgate 180 amp buss fuse and then straight to the optima battery. Disconnect the wire that goes from fuse box to alt completely altogether, leaving only battery to fuse box and then battery to 180 amp fuse holder to the altenator. Don't use the isolator they suck! Other than that the alt is machined with very sharp edges and cut the f@$@ out of my hands so wear gloves, and the new one is so big it might make you think it won't fit but it will. This won't just be a one hour project unless you don't mind sloppy wiring. Well worth every penny imho my trucks interior lights have never been so bright. There is no instruction manual though and the top alt bracket needs the pushed in sleeve to be pushed out till it can sit flush or install may make you think you need to machine down their heavy duty spacer but you won't have to. Good luck enjoy the huge amt of extra power.
     
To Top