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TBI Wiring question

Discussion in 'The Garage' started by justinf, Mar 20, 2004.

  1. justinf

    justinf 1/2 ton status

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    Okay, I recently picked up an 81 CJ7 and I am wiring up an 87 TBI 350 in it. I have traced most everything out, but I can't figure out what a couple of wires are. In the plug on the firewall, there is an orange wire, a dark brown wire, and a purple with white wire that I can not figure out what they go to. I have looked through the Haynes manual, but still nothing.

    Also, there are two relays that mount to the firewall from the 87, one is the fuel pump relay, and I can't figure out what the other one is. I can not find it in any wiring diagrams and haven't spent a lot of time searching through the harness.

    Please let me know if you guys know what any of these are for.

    Thanks,
     
  2. scoutillac

    scoutillac 1/2 ton status

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    I can look tonight and get back to you tomorrow. I just did the same thing with a 63 scout.
     
  3. Confedneck

    Confedneck 3/4 ton status

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    horn relay?? wires to power the horn?
     
  4. justinf

    justinf 1/2 ton status

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    I didn't think the horn used a relay?? /forums/images/graemlins/thinking.gif

    Any other ideas?
     
  5. dyeager535

    dyeager535 1 ton status Premium Member

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    What was the donor vehicle? If it had an electric fan, that would be what the other relay was.
     
  6. justinf

    justinf 1/2 ton status

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    I'll have to check, all I know is it was an 87 2WD pickup, 3/4 ton I think, but not sure. It came from a buddy of mine, I may have to check with him.
     
  7. frankin5

    frankin5 Super Mall Crawler Premium Member

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    second relay if the truck was 3/4 ton with 400 is the kick-down relay for the 400 trans. wires=orange,lite brown/black stripe and pink with black stripe. /forums/images/graemlins/k5.gif
     
  8. testpilot

    testpilot Newbie

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    What ecm? 1227747 or 1228747 I can forward you the wiring diagram.
     
  9. justinf

    justinf 1/2 ton status

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    That's probably it, those are the color wires going to it the relay. Thanks for your help.
     
  10. justinf

    justinf 1/2 ton status

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    I will have to check to make sure which computer it is. I have the wiring diagrams from the Haynes, but if you have some other wiring diagrams, I would appreciate you sending them to me. I'll post up tonight which one it is.
     
  11. justinf

    justinf 1/2 ton status

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    The computer is 1227747. I would appreciate it if you could send me wiring diagrams. My email address is justinf@clark-dietz.com

    Thanks. /forums/images/graemlins/waytogo.gif
     

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