mcantar18c
NAXJA Forum User
- Location
- Fayettnam
Ok, it ain't a Jeep, but troubleshooting this would be mostly the same with an XJ.
Dual batt. setup, around 800-850 CCA each. Starter battery is only a couple weeks old, but I'll load-test both of them tomorrow to be sure.
I don't think its the alternator itself, as the past couple days its started out cranking real slow and then increased speed, as if the alt. was providing a little juice.
Then tonight instead of picking up speed and finally firing it just drained the battery and died. Jumped it, brought it home, tightened the belts (alternator belt was a bit loose), jumped it again, drove a good 30 min at highway speed, electrical components were strong and healthy... tells me that the charging system is good at least. Brought it home and killed it, waited a few seconds and started it up again... cranked much slower than normal but fired after a good 5 seconds of cranking. Waited 30 seconds and killed it. Went out for 30-45 min, came home and tried again to make sure it'd be on its feet for school tomorrow... cranked a few times and died
From how it felt after I killed it and started it I'd guess that a good 10-15 seconds of being off would have drained her enough to prevent cranking.
All this has me thinkin parasitic load... a short would most likely prevent starting regardless of the voltage or amps running through, whereas a parasitic load only consumes so much. Anybody second this? Disagree? Any other possibilities?
Dual batt. setup, around 800-850 CCA each. Starter battery is only a couple weeks old, but I'll load-test both of them tomorrow to be sure.
I don't think its the alternator itself, as the past couple days its started out cranking real slow and then increased speed, as if the alt. was providing a little juice.
Then tonight instead of picking up speed and finally firing it just drained the battery and died. Jumped it, brought it home, tightened the belts (alternator belt was a bit loose), jumped it again, drove a good 30 min at highway speed, electrical components were strong and healthy... tells me that the charging system is good at least. Brought it home and killed it, waited a few seconds and started it up again... cranked much slower than normal but fired after a good 5 seconds of cranking. Waited 30 seconds and killed it. Went out for 30-45 min, came home and tried again to make sure it'd be on its feet for school tomorrow... cranked a few times and died
All this has me thinkin parasitic load... a short would most likely prevent starting regardless of the voltage or amps running through, whereas a parasitic load only consumes so much. Anybody second this? Disagree? Any other possibilities?
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