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Relay on passenger side of tranny tunnel. HELP!!!

Discussion in '1969-1972 K5 Blazer | Truck | Suburban' started by aksidentproan, Sep 5, 2002.

  1. aksidentproan

    aksidentproan 1/2 ton status

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    There is a relay on the passenger side of my tranny tunnel that I broke(stupid) when takin my engine out. I've tried everywhere and they all say "its been discontinued." Its got a plug with 3 or 4 wires(female spade tips) that hook up to it. Anybody know what this controls? Where can I get another? Thanks.

    Evan
     
  2. chevyracing

    chevyracing 1/2 ton status

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    maybe the horn relay, I will go look at mine. Give me a better description of where it is.

    John
     
  3. chevyracing

    chevyracing 1/2 ton status

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    Nope not the horn relay. I have one on my 70 1/2 ton pickup but not on my 72 Blazer. The one I have on my 72 says-

    3961573
    littlefuse

    I don't have the engine in my 70 right now and I could not find anythiing on the harness that would connect to it. Do you have the plug located that connects to the harness?

    John
     
  4. Blazer1970

    Blazer1970 1/2 ton status

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    I would guess that it is the relay for the TCS (transmission controlled spark) system. This was an emissions system that controlled when the vacuum advance was allowed to operate. The system has typically been disabled over the years on these trucks, so unless yours is still operational, forget the relay.
     
  5. chulisohombre

    chulisohombre 1/2 ton status

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    if you have a manual tranny,it could be your backup light relay.
     
  6. aksidentproan

    aksidentproan 1/2 ton status

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    Ding Ding Ding. Blazer70 got it right. I just found out its the Distributor advance relay from a local parts store.

    Evan
     
  7. chulisohombre

    chulisohombre 1/2 ton status

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    i lose,oh well.i didnt know what kind of tranny you had.glad you dont have to worry about the sensor.more crap you dont really need anyways.
     

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