Question about 2004 Jeep Grand Cherokee

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2004 jeep grand cherokee will not start, dash light blink , gauges move back and forth. Battery seem to be ok.

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  • Anonymous Mar 21, 2014

    I have a 2008 jeep grand Cherokee the dash lights won't come on and won't start

  • Anonymous Mar 21, 2014

    I have a 2008 jeep grand Cherokee the dash lights won't come on and won't start

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  • Jeep Master
  • 6,982 Answers

It takes very little voltage and amperage to operate dash gauges. You cannot rely on "seems" when it comes to the battery. A good battery should have standing voltage of at least 12v and be able to "snap back" from a fifteen second 200 amp load. Under load, the voltage should not drop lower than 9.5 volts. Have the battery charged and load tested before going anywhere else with this. then make sure connections are clean and tight. After you get it started, if battery was good, check starter draw and charging system operation. If it does not start, check power flow from key through neutral safety switch and starter relay to starter.

Posted on Sep 06, 2009

Testimonial: "very helpful , battery was no good , installed new battery. problem solved"

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1 Answer

I put a new alternator/battery in my 02 jeep grand cherokee limtid and now my batttery gauge keeps moveing back and forth . whats causeing this?


what engine option????????????????????????????
that dash meter is a volt meter.
so when that meter varies
connect any hand meter, DMM (volts) to the battery lugs
do both meters vary,?,, yes, BINGO its not fibbing to you, the
voltage is out of control. per below:
but key on volts is 12.6v
and running does vary from 13.3 to 15v, this is NORMAL
outside that range is AB-NORMAL.(running)

post actual accurate voltages. and we cant find true cause.
is engine RPM always above 800 rpm
is the alternator fan belt at spec, tension?

if engine RPM drops , way low the ALT drops.
if the belt slips ,same deal.
My 4.0L uses a serpentine belt that must be set real tight.
100lbs. in fact. i have a spec tool to do that. (guessing dont work)
tell engine on 02 GC and we can look it up.


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1 Answer

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Poor grounding can cause many of the conditions you have listed. When checking power with a volt meter, this goes unnoticed because the meter does not draw enough amperage to cause the bad connection to break contact. Your battery is grounded to the engine block and also has a small lead to the fender. Many components have individual ground leads as well (including most computers) I would check all ground leads and clean the contact surfaces with sandpaper or a wire brush. Adding an additional ground wire is a good idea as well. Don't forget that the dash board frame must also provide a good ground as well.
Many times this is all you need to do...sometimes though, control modules can be damaged because in having a partial ground, they build up heat, due to additional resistance in the circut.
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Hi dcwise,

Coming to your rescue....Check on the earthing cables from the battery and especially from the management computer....Once those have been checked try replacing the engine main relay and go through all the fuses....Let me know if you live happily ever after

Best regards Johngee10

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