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Cat 3406 won't start

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by BobHjr, Oct 10, 2021.

Page 2 of 2
  1. Oct 10, 2021 #11
    BobHjr

    BobHjr Bobtail Member

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    Oct 9, 2021
    WV USA
    0
    I do have w wiring diagram of the truck breaker box and it shows a shutdown solenoid fed from the ign. switch ( hot in run) but ?????
     
    BobHjr, Oct 10, 2021
    BobHjr, Oct 10, 2021
    #11
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  3. Oct 10, 2021 #12
    BobHjr

    BobHjr Bobtail Member

    10
    0
    Oct 9, 2021
    WV USA
    0
     
    BobHjr, Oct 10, 2021
    BobHjr, Oct 10, 2021
    #12
  4. Oct 10, 2021 #13
    lester

    lester Midwest's #1 Feed Hauler

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    It's a 1LW. No shut down solenoid. Do you get a check engine light when you turn the key switch on?
     
    lester, Oct 10, 2021
    lester, Oct 10, 2021
    #13
    Roger McG, Slowpoke KW and Caterpillar Cowboy Thank this.
  5. Oct 10, 2021 #14
    Caterpillar Cowboy

    Caterpillar Cowboy Heavy Load Member

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    Nov 11, 2010
    Wyoming
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    Runs on either then dies I'm guessing electrical. Either engine electrical (sensors) or not getting correct power to the ECM. I've had both happen.

    x2 or x3 I lost count your 1LW does NOT have a shut down solenoid. Your generic freightliner diagram may have that as an option but it's not on the 1LW
     
    Caterpillar Cowboy, Oct 10, 2021
    Caterpillar Cowboy, Oct 10, 2021
    #14
    Roger McG, BobHjr and Slowpoke KW Thank this.
  7. Oct 10, 2021 #15
    heavyexpert

    heavyexpert Bobtail Member

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    Oct 16, 2019
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    Pull the filter out of the davco and see if they left the old filters center rubber gasket on the stand pipe If they left the rubber seal/gasket from the old filter on the center standpipe it will do this.
     
    heavyexpert, Oct 10, 2021
    heavyexpert, Oct 10, 2021
    #15
  8. Oct 10, 2021 #16
    BobHjr

    BobHjr Bobtail Member

    10
    0
    Oct 9, 2021
    WV USA
    0
    No, the check engine light stopped coming on when the no start problem occurred , that is the first thing we noticed
     
    BobHjr, Oct 10, 2021
    BobHjr, Oct 10, 2021
    #16
  9. Oct 10, 2021 #17
    AModelCat

    AModelCat Road Train Member

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    Jul 7, 2015
    Canuckistan
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    No check engine light during the system check when you first turn the key on? Check ECM constant power, keyed power and ground.
     
    AModelCat, Oct 10, 2021
    AModelCat, Oct 10, 2021
    #17
  10. Oct 10, 2021 #18
    BobHjr

    BobHjr Bobtail Member

    10
    0
    Oct 9, 2021
    WV USA
    0
    I didn't think it had a shutdown solenoid ( I couldn't find one) but I wasn't sure what exact model it is, and I'm not familiar with this engine. I have only seen this truck once and that was yesterday and only know a bit of it's history.
     
    BobHjr, Oct 10, 2021
    BobHjr, Oct 10, 2021
    #18
  11. Oct 10, 2021 #19
    BobHjr

    BobHjr Bobtail Member

    10
    0
    Oct 9, 2021
    WV USA
    0
    Thanks, I'll see if I can get a wiring diagram of the ECM connector pins. I only have four IGN fed breakers in the truck and those wires are numbered but as for constant power, I'll have to trace that.
    I do know that there is a problem in the solenoid that mounts on the firewall ( looks like a Ford starter solenoid) as the owner has two of the terminals jumped.
    Where is a good source for a diagram?
     
    Last edited: Oct 10, 2021
    BobHjr, Oct 10, 2021
    BobHjr, Oct 10, 2021
    #19
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