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Unread 07-23-2011, 07:46 PM   #1
imajeepman
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1993 ZJ 
 
Join Date: Jun 2011
Location: riverview, FL
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Low Battery Reading - Bad Ground? No Start!!

Ok so I recently bought a "new to me" 93, 4.0 Laredo to add to my 93, 4.0 Limited.

Problem: The battery reading on dash read's different but mostly 10amps rather than the norm of 14, It would start all the time with no delay. Today however, for some odd reason I have power (lights) but no sound or click when I try to turn it over. The previous owner installed an alarm system to bypass the standard Jeep alarm. I thought the alarm was draining the battery so I pulled the alarm, replaced the negative terminal and checked the ground to the altenator and body (all seems clear).

I'm doing some late research before I pull the starter tomorrow morning.

Please help, I'm not very good with electrical....

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Unread 07-23-2011, 08:05 PM   #2
SAR-Swimmer
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1997 ZJ 
 
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I'd try another battery , or at least have the old one tested, first. When mine died, I did have lights, but not enough juice for anything else. Changed the battery and haven't had a problem since.
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Unread 07-23-2011, 08:29 PM   #3
imajeepman
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I forgot to mention I hooked up my battery from my Limited (also brand new) and it gave me the same problem.
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Unread 07-23-2011, 08:36 PM   #4
ZeeJay1997
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those are volts on the instrument panel.
you need a meter to check voltages under the hood.
short of a meter, get someone to turn the key and then wiggle the big cables around.
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Unread 07-23-2011, 08:54 PM   #5
Compgeek789
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I usually have 10 volts when my car is off. Mine just takes longer to turn over, and I don't have an alarm. Depending on how long your vehicle sits for, you can remove the Ignition-Off-Draw fuse to stop it from drawing battery. I would try this first, but just as a note, your alarm system and power locks may be inoperable. You should still be able to open the car manually with the key, so I would try to keep an eye on your car if you usually alarm it.

I don't know all of the things powered by the IOD fuse, so I would look around the Internet and see before trying it.

My reference is to the manual (I have 1 yr newer). Under Maintenance, under Vehicle Storage.

Last edited by Compgeek789; 07-23-2011 at 09:05 PM..
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Unread 07-23-2011, 09:04 PM   #6
imajeepman
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The alarm never interfered with starting and the unlock still works (lock never worked). I don't have a volt meter but plan to hit Advance to replace the battery and test the starter and altenator. I'm kinda tight with the guys up there so I'm going to see if I can borrow their's or a neighbor's.

NOTE: I have a battery charger, when I hook up the battery charger it's supposed to act like a jump and I still don't get a reaction (no click, no crank)
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Unread 07-23-2011, 09:06 PM   #7
imajeepman
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What reaction would I get by wiggling the big cables...I've been reading....

http://www.autoshop101.com/forms/hweb4.pdf

As a result of reading it really seems like I need a volt meter to properly diagnose the issue.
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Unread 07-23-2011, 09:38 PM   #8
ZeeJay1997
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Quote:
Originally Posted by imajeepman View Post
What reaction would I get by wiggling the big cables
Because sometimes they get corrosion in the terminals or under the jacket where you cant see it. Moving them around sometimes will make an intermittent connection to carry more load and the engine will start.

What you are describing sounds like the main battery terminal is corroded inside the crimp connection. I say this because you have low voltage everywhere.

Also suspect the ground connection on the right fender by the battery, and the ground under the alternator on the block
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Unread 07-23-2011, 10:28 PM   #9
imajeepman
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I disconnected the small ground cable wire connection and saw what looked like corrosion on the connector inside. It got kinda late and no lighting so I'm going to use your advice in the morning asap.
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Unread 07-24-2011, 08:50 AM   #10
Mark05059
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you can also try moving the shifter to neutral and trying to start it there.
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Unread 07-24-2011, 10:27 AM   #11
gothchick
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^^^ Good call. If it ain't the battery/ connections - It could be a faulty neutral safety switch.
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Unread 07-24-2011, 11:18 AM   #12
imajeepman
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Where's the neutral safety switch?
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Unread 07-24-2011, 11:28 AM   #13
gothchick
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It's located on the driver's side of the tranny. But try starting in neutral first.
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Unread 07-24-2011, 12:04 PM   #14
imajeepman
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Same issue, Power but nothing doing...
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Unread 07-24-2011, 12:08 PM   #15
gothchick
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Hmmm, then it sounds like either a bad starter motor or relay. You could try tapping the starter motor with a wrench or something, then try firing it up. You might have a dead spot on the brush.

The starter relay is in the junction box next to the battery.
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