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Starter Problem

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

  1. May 31, 2022
    jason mays

    jason mays New Member

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    Guys, I have a 1970 CJ-5 dauntless V-6. I've had an intermittent starter problem for some time. I turn the key over and no solenoid engagement. I thought it was the starter so I replaced it. Now it still won't turn over. I'm showing 6-7 volts at the control wire terminal of the starter when I turn the engine over and I don't even hear the solenoid click. However I can jumper the starter and it will turn the engine over. Any help would be much appreciated. Thanks in advance.

    Jason
     
  2. May 31, 2022
    jeepstar

    jeepstar Well-Known Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Sheboygan
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    Solenoid is on the starter? Bad "new" starter Solenoid?
     
  3. May 31, 2022
    sterlclan

    sterlclan Member 2022 Sponsor

    exploring the...
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    bad ignition switch?
     
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  4. May 31, 2022
    Richard in AZ

    Richard in AZ I just don't understand the like of patina

    PHX AZ
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    I have the same problem on my 70 model. I am thinking there should be more than 7 volts on the control wire terminal on the solenoid. I changed the ignition switch and the voltage increased to 9 volts.....improved to working intermittently

    Somewhere high resistance is eating up voltage.

    Richard
     
  5. May 31, 2022
    jason mays

    jason mays New Member

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    Solenoid is on the starter and the solenoid/starter has just been replaced. I can jumper the solenoid terminals and the engine will start.
     
  6. May 31, 2022
    jason mays

    jason mays New Member

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    I'm guessing that could be it.
    Hmmm... it sounds like I have a similar problem.
     
  7. May 31, 2022
    Walt Couch

    Walt Couch sidehill Cordele, Ga. 2024 Sponsor 2023 Sponsor 2022 Sponsor

    cordele, Ga.
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    If you have the Delco starter then be aware the solenoid draws a considerable amount of current to latch the solenoid. Run another wire along with the start wire existing and see if that works.
     
  8. Jun 1, 2022
    Bondo

    Bondo Master General Re-Engineer,...

    Greenfield Me.
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    Ayuh,..... Clean to shiny metal Clean, both ends of both battery cables,....

    You've got some severe corrosion, somewhere,....
     
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  9. Jun 1, 2022
    baldjosh

    baldjosh Member

    pacific north west
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    that was my first thought as well...dont rule out corrosion in the ignition switch as well
     
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  10. Jun 3, 2022
    jason mays

    jason mays New Member

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    Thanks for the reply. Sounds logical.
     
  11. Jun 3, 2022
    jason mays

    jason mays New Member

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    Thanks man.
     
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  12. Jun 22, 2022
    Robert Demings

    Robert Demings New Member

    Albany, Ga
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    I've the same issue on my 69, only I get draw down to 6.5v at the starter. Jumps with no issue, no action with the ignition. Even new ignition switch wouldn't work.
     
  13. Jun 22, 2022
    Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

    Tantallon, Nova...
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    Same fix- you've got corrosion between the the battery & the starter, may be hidden under the cable insulation. Try running your voltmeter from one end of the cable to the other while cranking, you'll see 5 to 6 volts- without corrosion it would probably be a quarter to a half a volt.
     
  14. Jun 22, 2022
    Twin2

    Twin2 not him 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Virginia Beach, VA
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    I had the same problem when I first got jeep . start no start . test light showed it was getting 12V at S terminal
    but wouldn't crank . did something I learned from being around VW's in my younger days
    VW bugs were notorious for no start . mainly cause starter switch wire to starter solenoid was so long
    added a ford starter solenoid to the GM starter solenoid . switch wire goes to ford solenoid . 10g wires from battery post on GM starter to ford solenoid to feed the S terminal on GM solenoid .never had a problem with it starting in over 40 years
    Ford solenoid - Copy.JPG
     
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  15. Jun 23, 2022
    garage gnome

    garage gnome ECJ5 welder

    Western MA
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    Check the engine bay harness plug. I had an issue there with snowshoe.
     
  16. Jun 23, 2022
    jeepdaddy2000

    jeepdaddy2000 Active Member

    Eagle Point oregon
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    This.
    This seems to be a "common" issue with the V6. It seems the ignition wire is either too long, too small, or a combination of both.
    Back in the 80's I installed a Ford solenoid on the right fender. Ran the battery cable down to the battery post on the starter and ran a jump wire between the starter post and the battery post and never had another issue.
     
  17. Jun 23, 2022
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Medford Mass USA
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    I don't understand what problem you are trying to solve with the Ford solenoid. On first impression, it seems like putting an additional set of contacts in the current path would simply lower the voltage to the starter. Is it a problem with the switch, or with the motor? The Ford solenoid is meant to power the starter motor. If you need a boost for the solenoid winding, I'd suggest a Bosch-type relay. 30 amps direct from the battery should be plenty, if the current from the ignition switch is insufficient.

    I'd also comment that those GM starter-mounted solenoids are failure prone. I would not hesitate to replace it with the best quality one I could find. https://www.rockauto.com/en/moreinfo.php?pk=42688&cc=1029833&pt=4188&jsn=473
     
    Last edited: Jun 23, 2022
  18. Jun 23, 2022
    jeepdaddy2000

    jeepdaddy2000 Active Member

    Eagle Point oregon
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    Intermittent starting issues. Turn the key and sometimes nothing. I went over my system and couldn't find any issues. Wound up adding the
    Ford solenoid and never had another problem.
     
  19. Jun 23, 2022
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Medford Mass USA
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  20. Jun 23, 2022
    Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

    Tantallon, Nova...
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    With the solenoid engaged the voltage at the starter drops to 6.5, this has nothing to do with the ignition switch or the solenoid- it's (relatively) high resistance on the cable from the battery to the solenoid or the battery's ground jumper. Since he says it works with jumpers it's probably one of the connectors at the battery that needs cleaning or replacing.
     
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