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Starter Problem

Discussion in 'Early CJ5 and CJ6 Tech' started by jason mays, May 31, 2022.

  1. Jun 23, 2022
    Robert Demings

    Robert Demings New Member

    Albany, Ga
    Joined:
    Jul 2, 2019
    Messages:
    41
  2. Jun 24, 2022
    jeepdaddy2000

    jeepdaddy2000 Member

    Eagle Point oregon
    Joined:
    Jun 24, 2004
    Messages:
    792
    I don't think the solenoid is engaging.
    I'm assuming the "control wire" is the solenoid engagement wire from the ignition switch and not the battery cable attached to the starter motor.
     
  3. Jun 24, 2022
    jeepdaddy2000

    jeepdaddy2000 Member

    Eagle Point oregon
    Joined:
    Jun 24, 2004
    Messages:
    792
    I used the Ford relay to power the starter.
    Solenoid wire (purple) to the S terminal of the solenoid.
    Battery cable to solenoid.
    Battery cable from solenoid to starter.
    Jump lead from starter motor to starter relay.

    I mimicked the system Ford used.

    In line with the solenoid wire:
    Ignition (purple) wire to 86
    ground 87
    larger wire from battery to 30
    wire from starter solenoid to 87

    The relay in this configuration would provide added power to the stock solenoid. Probably a better (at least simpler) way to do it than what I did.
     
  4. Jun 24, 2022
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor 2021 Sponsor 2020 Sponsor

    Medford Mass USA
    Joined:
    Aug 10, 2003
    Messages:
    23,615
    Yeah, twin2's picture shows the Ford solenoid powering the GM solenoid - no battery cable to the Ford solenoid.

    It's instructive to take these solenoids apart. They both have a metal disk that drives into a pair of big contacts when the solenoid is energized. You can sometimes repair them by taking apart, flipping the disk, and burnishing the contacts. Usually they die by arcing at the disk, and that preventing good contact.

    I kinda think the GM solenoids get weak with age. You'd think that copper windings have no moving parts, and would not wear out, but stuff like this does get weaker with age. More current to the GM solenoid should strengthen a weak part, as long as the windings aren't totally open.
     
  5. Jun 25, 2022
    C-dubb

    C-dubb New Member

    Atchison, KS
    Joined:
    Oct 11, 2021
    Messages:
    20
    I have done the Ford solenoid trick for years. Some Delco starter/solenoids suffer from heat soak and won't pull the solenoid completely when hot. This always solves the problem.
     
    Twin2 likes this.
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