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Curt Trailer Wiring Harness

Discussion in 'For Sale' started by WamboJambo, Jul 28, 2020.

  1. WamboJambo

    WamboJambo Supporting Member Supporting Member

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    Joined:
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    Location:
    NC
    First Name:
    James
    Truck Year:
    1978
    Truck Model:
    C10
    Engine Size:
    250
    Curt T-Connectors 55311 new in box, purchased on summit but has the wrong connectors. It's a no-splice 4-way flat trailer wiring connector, says it fits 73-84 Blazer, C/K pickup, Suburban, but did not fit my 1978 Chevy C10. Mine has flat pins instead of the rounded ones, can't find much information on when that changed, maybe for an 80+ or GMT-400? Would just recommended checking your taillight wiring harness against the pictures. Free to a good home if you're near the Raleigh NC area and can pick it up, probably not worth it to ship since it's only like $15 new but could be convinced if someone really wants it.

    box.jpg connector_female.jpg connector_male.jpg trailer_pins.jpg whole_harness.jpg
     
  2. Big Chip

    Big Chip Full Access Member

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    Location:
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    First Name:
    Kevin
    Truck Year:
    1979
    Truck Model:
    C35
    Engine Size:
    454
    E-Trailer sent me that same one but the box had the proper part number for the 79. Second one they sent was the right one with the flat terminals, same part number on the package, so if anyone knows what the one with the round terminals fits there’s another one up for grabs for just the cost of shipping.
     
  3. bigcountry78

    bigcountry78 Supporting Member Supporting Member

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    Location:
    Hickory, North Carolina
    First Name:
    James
    Truck Year:
    1978
    Truck Model:
    K10 Custom Deluxe
    Engine Size:
    350
    I’d be interested, going to have to check and see what kind of connection mine has though.
     
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  4. bigcountry78

    bigcountry78 Supporting Member Supporting Member

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    Truck Year:
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    Truck Model:
    K10 Custom Deluxe
    Engine Size:
    350
    Do you still have this? Been chasing trailer wiring problems all afternoon, and part of my issue is on the truck end.
     
  5. WamboJambo

    WamboJambo Supporting Member Supporting Member

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    First Name:
    James
    Truck Year:
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    Truck Model:
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    Engine Size:
    250
    Absolutely, and it's yours at any time. Did you determine your truck has the rounded pins?
     
  6. bigcountry78

    bigcountry78 Supporting Member Supporting Member

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    Truck Year:
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    Truck Model:
    K10 Custom Deluxe
    Engine Size:
    350
    It appears to, strange though since mine is also a 78. I’ll double check tomorrow after work.
     
  7. AuroraGirl

    AuroraGirl Supporting Member Supporting Member

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    Location:
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    First Name:
    Taylor
    Truck Year:
    1978, 1980
    Truck Model:
    K10, K25
    Engine Size:
    400(?), 350
    The harness changed from circle to flat at some point, my 77 frame has a round plug. my 1980 i dont know what it had... my grandpa hardwired it in. I have a spare rear lighting harness on a trailer from a 78 and an unknown year I could look at.

    The only difference is the connector and the socket for the bulbs, i think the later design stressed the connections less and was more waterproof.
     
  8. bigcountry78

    bigcountry78 Supporting Member Supporting Member

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    Truck Year:
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    Truck Model:
    K10 Custom Deluxe
    Engine Size:
    350
    I was wrong. Mine has the flat connector. Oh well.

    90FBBDAD-2B60-46AF-BE74-AE638F9207B2.jpeg
     
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