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81 C20 build

Discussion in '2wd Pick-Ups C/R 20 2500 C/R 30 3500' started by Dadof2, Nov 1, 2014.

  1. Dadof2

    Dadof2 Full Access Member

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    Joined:
    Oct 31, 2014
    Location:
    Central Texas
    First Name:
    Craig
    Truck Year:
    1991 , 1981
    Truck Model:
    R1500 Chevy Sub, C20
    Engine Size:
    350 in both trucks
    Arrggghhhh!!!!

    Wiring, and what in the hell did I forget to put on my trans before I put it in the truck? I swear I took better pictures of where & what the wiring harness connected to, but clearly I didn't. The wiring harness shown is from a truck that was being parted out. Mine was literally bare wires.
    24CD1027-BC64-4AA9-840C-5FC5D865F123_zpshejj4jbs.gif
    To the starter correct? And obviously I am going to have to replace the fuseable link?

    Any ideas where this pig tail goes? Looks to be from starter to ???
    460EBCE8-DA3D-4150-8D91-1A4715C726E9_zpscjdl4ud9.gif


    Wires coming off of the alternator. I have no idea what they connect to as the "new" wiring harness doesn't have an obvious plug in for them, or the same colored wires.
    0211E807-EDB6-44CC-80D6-A3F289DBE915_zpskhxchtzw.gif

    How hard is it to turn truck into a 1 wire alternator? I can look it up I reckon.


    Pretty sure there are parts missing here on the transmission, the small "hook" thing in the approx 6 o'clock position of the picture:
    CA1BC3AB-4579-4930-A04D-20AD00D01671_zpsxlyufxbz.gif

    Getting much closer to getting this thing up and running. Thanks in advance for the help.
     
  2. 89Suburban

    89Suburban Full Access Member

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    Joined:
    Dec 7, 2010
    Location:
    Southeast PA
    First Name:
    Paw Paw
    Truck Year:
    2007
    Truck Model:
    Chevrolet Tahoe LT
    Engine Size:
    5.3, 4WD
    Yes the first pic that is the harness from the positive batt cable/post on the starter to the junction block on the firewall with fusible link protection.

    The hook thing on the trans is for the Throttle Valve cable. That bolt next to it holds it down on the case and it's sealed with an o-ring.

    I know the pink wire on the alternator goes to ign on feed. Not sure about the tan one. A larger fused wire goes from that big post on the back of the alternator to the junction block on the firewall.
     
  3. robert8096

    robert8096 Full Access Member

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    Joined:
    Mar 27, 2011
    Location:
    Goose Creek SC
    First Name:
    Robert
    Truck Year:
    1986
    Truck Model:
    c10
    Engine Size:
    350
    Dadof2 likes this.
  4. Dadof2

    Dadof2 Full Access Member

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    114
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    Joined:
    Oct 31, 2014
    Location:
    Central Texas
    First Name:
    Craig
    Truck Year:
    1991 , 1981
    Truck Model:
    R1500 Chevy Sub, C20
    Engine Size:
    350 in both trucks
    Thanks, looks like the service manual, more wire, heat shrink, and I are going to become very good friends here in the near future.

    Thanks for the link. I had considered a 1 wire alt, but think I'll stick with the 3 wire.

    If anyone has pictures of their wiring harnesses I'd be most appreciative to see them.
     
  5. Stewzer55

    Stewzer55 Full Access Member

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    Joined:
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    Location:
    Ohio
    First Name:
    Stew
    Truck Year:
    1988
    Truck Model:
    R30
    Engine Size:
    350 TBI
    I hear you on projects that take forever, I haven't really had the time to mess with my truck in months...
     
  6. Dadof2

    Dadof2 Full Access Member

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    Joined:
    Oct 31, 2014
    Location:
    Central Texas
    First Name:
    Craig
    Truck Year:
    1991 , 1981
    Truck Model:
    R1500 Chevy Sub, C20
    Engine Size:
    350 in both trucks
    Been a while but I am back. New transmission in our 1991 Suburban, and more importantly today...........The new wiring harness, transmission lines, air filter & housing, battery going in. Pics to follow if I don't get mad and hammer toss the camera when the frustration level peaks.



    What?:shrug: Like I'm the only one that's happened to? :gr_grin:
     
  7. Mr Clean

    Mr Clean Full Access Member

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    Location:
    North East Texas
    First Name:
    Shawn
    Truck Year:
    1982
    Truck Model:
    K10 Extra Cab w/ Proper SWB, & 82 2WD Blazer
    Engine Size:
    454 BBC, & 383 Stroker
    I don't know about a camera, I have had a phone or two die of deceleration trauma.
     
  8. Dadof2

    Dadof2 Full Access Member

    Posts:
    114
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    2
    Joined:
    Oct 31, 2014
    Location:
    Central Texas
    First Name:
    Craig
    Truck Year:
    1991 , 1981
    Truck Model:
    R1500 Chevy Sub, C20
    Engine Size:
    350 in both trucks
    Hahaha...I understand completely.


    No pics yet, but on Friday we (my sons) and I got her to fire up for just a few seconds. Open exhaust, a 350, and in a garage.... Like angels were singing.

    Anyways, kind of a boring post, but I'll get some pictures posted hopefully on Monday. Just nice to be making some forward progress.
     

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