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Cranking issue...how to test??

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Burt4x4, Mar 15, 2000.

  1. Burt4x4

    Burt4x4 3/4 ton status

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    Hey dudes,
    I just replaced the starter solinoid and now turnning the key it wont crank over. So I took a screwdriver and shorted the solinoid and it cranks. I may have the two wires that connect to the small terminals hooked up backwards(ran outa time last night to swap them).
    It's kinda a pain to get to these wires so is there a way to test them to verify witch one goes on the left and the right? Or how about testing to make sure the wire doesnt have an open somewere?
    Any thoughts on this would be great!
    Burt4x4

    Rock ON!
     
  2. James Rusty 79

    James Rusty 79 Registered Member

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    You hook up the wires on the terminal that is next to the block or on the inside of your soliendo. The outer terminal is ownly used if you have points and thats to give the points 12 volts when cranking.

    James Rusty 79
     
  3. Burt4x4

    Burt4x4 3/4 ton status

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    Hmmm, Ok I use to have a point dist.(72K5). Now I have MSD dist.
    So are you saying to just hook both wires to the inside terminal??
    when I turn the key does that provide the ground or the 12v. to the starter?

    Rock ON!
     
  4. Todd78/87

    Todd78/87 1/2 ton status

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    No,, one little wire goes on the small terminal on the "inside" , the other little wire goes with the big 12V terminal.

    Todd 78/87[​IMG]
    [​IMG]
     
  5. Blazer1970

    Blazer1970 1/2 ton status

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    You only need one wire, it should be purple, if I remember right. It goes to the inside (solenoid, marked "S", I think) terminal. The other wire (yellow?) was used to supply full battery voltage to the coil while cranking with the points type ignition. You can hook it to the other terminal on the starter, or just tape it off.

    Tim

    1970 Blazer CST 4X4 350 SM465 NP205
    1987 Suburban 4X4 350
    1988 Chevy Pickup 4X4 350
     
  6. Burt4x4

    Burt4x4 3/4 ton status

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    Ok, so how do I test this one wire going to the S terminal?
    If I use my meter and test it to gound should it be at 0v then when I turn the key to start the cranking sould it go to 12v???
    Thanks
    Burt4x4

    Rock ON!
     
  7. DangerB

    DangerB 1/2 ton status

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    Thats right, the little wire is power to the solenoid. It fires when you turn the key. Thats why when you cross it with the screwdriver it starts. The bigger wire is constant power.

    DangerBrett[​IMG]
    <font color=blue>life is a race, you have to look good and go fast!</font color=blue>
     

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