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What are these relays on my firewall and do I need them?

Discussion in 'Electrical & Audio' started by louu, Mar 6, 2021.

  1. Mar 6, 2021 at 3:57 PM #1
    louu

    louu Full Access Member

    Posts:
    102
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    98
    Joined:
    Sep 19, 2020
    Location:
    South NJ
    First Name:
    Lou
    Truck Year:
    1986
    Truck Model:
    C30
    Engine Size:
    454 baby!
    All the emissions stuff on this truck is gone. I'm in the process of putting on an aftermarket fuel injection system on. All I need from the stock harness is power to the port on the HEI distributor. Are these two black boxes necessary?

    The harness on this truck is a mess and I'm hoping to clean it up. Looks like so many people have chopped it up over the years 20210306_152356.jpg 20210306_152359.jpg
     
  2. Mar 6, 2021 at 7:31 PM #2
    45acp

    45acp Member

    Posts:
    40
    Likes Received:
    20
    Joined:
    Mar 5, 2021
    Location:
    Antelope
    First Name:
    Mark
    Truck Year:
    1984
    Truck Model:
    K1500
    Engine Size:
    350
    14087500 is a air injection control module and 14094774 is a electronic brake control module. If you Google these part #'s you may be able to get a little more information than I can give you. Good luck!
     
  3. Mar 8, 2021 at 5:16 PM #3
    Scott91370

    Scott91370 Full Access Member

    Posts:
    379
    Likes Received:
    266
    Joined:
    Apr 2, 2018
    Location:
    Burleson, Tx
    First Name:
    Scott
    Truck Year:
    1982
    Truck Model:
    Sierra1500
    Engine Size:
    350
    What year is this on? I couldn't imagine anything newer than the 87 having air injection on it - but I did have an 89 Isuzu with it so it's possible.
     

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