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Battery Dead


 
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Tri-Kolor
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Joined: 02 Sep 2006
Location: Poconos PA

PostPosted: Fri Apr 06, 2007 7:35 am    Post subject: Battery Dead Reply with quote

Yesterday up on the mountain, the ZJ began to have problems starting.

I got it running, but it wouldn't stay running when the rpm's went anywhere near idle. I had to keep the revs up just to get home. The voltmeter reading was @ 14.

I use 5 year old DieHard from a full size GMC I used to have for off roading.

The Alternator has the following number codes on the little plate:

5602 7912

121000-3530 12V

Denso 70113

On the case there is a stamp in ink or paint. A circle with the number 62 inside. I do not know what the amperage rating is.

I don't know if the battery is too old, the alternator is bad, or if I am running too many accessories for the unknown alternator rating.

Please help,
Thanks,
TK
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Orangeamc13
Got Rev Limiter?
Got Rev Limiter?


Joined: 20 Feb 2006
Location: East Springfield, Massachusetts - U.S.A.

PostPosted: Fri Apr 06, 2007 8:18 am    Post subject: Reply with quote

You have the bigger alternator, I think it's 136amps. As opposed to 90amp alt. found in most ZJ's. Try getting a can of carb cleaner and cleaning your throttle boby inside and out, also clean the iac and port it goes into. Make sure you get all the carbon off the pintle (mushroom shaped thing). Even if this is not the problem, it's still good to do.
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Tri-Kolor
Member


Joined: 02 Sep 2006
Location: Poconos PA

PostPosted: Fri Apr 06, 2007 8:57 am    Post subject: Reply with quote

Thanks for the reply.

The battery is dead, my DMM is getting 10 volts across the terminals.
I was just wondering if the battery had expired of natural causes or if there was an underlying problem.

I will try what you mentioned, it can't hurt to clean things.
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Orangeamc13
Got Rev Limiter?
Got Rev Limiter?


Joined: 20 Feb 2006
Location: East Springfield, Massachusetts - U.S.A.

PostPosted: Fri Apr 06, 2007 9:54 am    Post subject: Reply with quote

Oh I see, I thought you were saying you checked the battery and it was at 14. I personally dislike the diehards, being a 5 year old battery I'm sure it's the problem. I run with Optimas.
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Brad The Best
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Joined: 14 Jan 2007
Location: Kamloops B.C Canada

PostPosted: Fri Apr 06, 2007 5:01 pm    Post subject: Reply with quote

if you only get 10 volts with the vehicle running then there is a problem with the charging system not the battery . of coarse your 5 year old battery might not be helping . i would start by replacing the battery and testing the alternator , im not sure if you have a internal or external voltage regulator but that could also be the problem . and lets not forget about the wires from the alternator to starter and to the battery .

you could charge the battery and put it in another vehicle if you have one and try running it for a while and see what happens to eliminate it or get it tested .

with the alternator you should probably take it off and get it tested , but the battery is easy i would start there .

it can be something as simple as corroded wires or a dead regulator
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Tri-Kolor
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Joined: 02 Sep 2006
Location: Poconos PA

PostPosted: Sun Apr 08, 2007 10:59 am    Post subject: Reply with quote

Went to Sears to replace it...turns out I got it 8 years ago....well I won't complain about the lifespan...
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5.9 andy
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Joined: 15 Feb 2007

PostPosted: Tue Apr 10, 2007 8:59 pm    Post subject: Reply with quote

8 years sounds good, but im with orange.. i love my optima.
also if u do end up do a new alternator get one for the 5.9 ZJ. its a direct bolt up to the 5.2 block, im not shure about the I6.. i dont know what u have.
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1fox2go
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Joined: 01 Dec 2004
Location: Fishersville, Virginia

PostPosted: Tue Apr 10, 2007 9:15 pm    Post subject: Reply with quote

did the problem just start out of no where or did it hint that something was wrong and progressively get worse?

if it wont idle that sounds to me like a tps another sensor

when the jeep is running what does the battery say? if its 14 like you mentioned i would say the alternator is functioning properly
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96 Cherokee 7.5 inch TnT long arm Locked F/R, D44 rear, 4.56s, 35x12.50 Muds/36x12.50 TSLs
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BeachCrawler
Member


Joined: 31 Jul 2005

PostPosted: Wed Apr 11, 2007 3:19 pm    Post subject: Reply with quote

I dying battery will simulate a bad TPS or IAC.
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'94 ZJ, BB, 31x10.5
'98 ZJ (Canadian Specs) Upcountry springs, 2-1/4" BB, RE rear TB Bracket, OME springs
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swamp boy
Cherokee Muderator
Cherokee Muderator


Joined: 01 Jan 2004
Location: New Orleans LA.

PostPosted: Wed Apr 11, 2007 9:06 pm    Post subject: Reply with quote

If the new battery solves your problems then fine.. But If you only had 10 volts with the engine running I would check that alt..

Simple test is ... Loosen the ground wire.. Start the jeep .. with it running pull the ground wire off. If it remains running your alt is good.. If it dies .. Your alt is bad..


Or you could go thru the hassle of pulling it out to get it checked.. Mr. Green
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Brad The Best
Member


Joined: 14 Jan 2007
Location: Kamloops B.C Canada

PostPosted: Mon Apr 16, 2007 5:47 pm    Post subject: Reply with quote

you can also put a screw driver behind the alt , if you feel a magnetic field its all good . please don't arc yourself out .

or just turn on every accessory you have and see what your voltage does
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5.9 andy
Member


Joined: 15 Feb 2007

PostPosted: Mon Apr 16, 2007 8:44 pm    Post subject: Reply with quote

no way on my life would i ever put a screwdriver near my alt unless i was standing on a rubber mat at least a 1" thick, but that is because i might twich and hit something.

if u do do it, be careful.
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