jeep no start

[mat kelly]

Hi All have 94 jeep grand Cherokee 4.0 litre 6cyl have intermittent no start and no crank no click but if I jump it car starts .I changed starter and battery and still happens sometimes don’t think its a short or wouldn’t start with a jump lights are bright just wont start . Talked to other techs they stumped because starts with a jump .Any help with this issue would be great Thanks

Topic

[Dan]

Do a voltage drop test on the battery cables. There maybe enough current to keep the car going, but not enough to turn the starter.

[mat kelly]

Hi Had cables checked was told it was good thank for help

[Shaun Flichel]

You should get at least dimming lights when trying to crank. Is the boosting vehicle running? This send extra voltage through the system although not even 2 volts. It may just be enough to kick something. Could be the solenoid.

[Dan]

If there is no crank, and no click, but the car runs then it sounds like power is not getting to the starter.
The cable may show 12 volts to the starter at rest but when the key is turned, only part of that voltage actually reaches the starter.

I may be overlooking something but since the car runs and starts with a jump, then all aspects of starting are there.

[mat kelly]

Going to replace cables will see if that works

[Author]

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