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Old 02-23-2011, 01:48 PM   #1
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Question jeep won't start

e charged old battery until it said full charge jeep started, next day nothing went and bought a new battery, brought it home it started, the next day the same thing will not start, no lights, no bing from fuel pump no nothing. what is wrong. no fuses are blown that we can find.

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Old 02-23-2011, 04:09 PM   #2
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There have been several posts on problems like this and the majority have been cables but if you are not getting anything to power and all fuses are good you may need to look at ignition switch.

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Old 02-23-2011, 04:15 PM   #3
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This sounds more like something is being left on all night or a light is not shutting off. A significant amount of parasitic drain will drain your battery and then next morning no startup.
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Old 02-23-2011, 04:23 PM   #4
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That is very true if the battery is dead. I was assuming the new battery is hot and was not getting power out.
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Old 02-23-2011, 04:43 PM   #5
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I figured it may be the case seeing as how he charged the old one and it started right up but the next day it didn't. Then put the new battery in and it started right up but the next day didn't.
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Old 02-23-2011, 04:57 PM   #6
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This sounds more like something is being left on all night or a light is not shutting off. A significant amount of parasitic drain will drain your battery and then next morning no startup.
I would bet on it.

Try this..... take off the red (pos) battery lead from the battery. Place a test lamp on the pos battery post and the other side of the test lamp on the cable. Does the light go on? If so, something is on within the jeep. Ignition, dome light.... pump. The light should not come on.
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Old 02-24-2011, 09:43 AM   #7
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this is for the original post. We do not understand what is going on with the jeep. We drove it on Monday, put it in garage for the night, got 18" of snow went out to move it forward would not start, put charger on slow charge, left it on overnite. Next morning it started all lights and everything, let it run for awhile. Next morning the same thing would not start no lights no nothing. Went and got new battery put it in started up just fine everything worked. The next day nothing. We have checked the fuses, all are okay unless there is some that we don't know about (hidden). We just can't figure out why it started twice but not again. Nothing is left on. Any help on this would be greatly appreciated we are on a fixed income. Kinda old for a jeep but once you drive one you won't want anything else. Like the saying goes it's a jeep thing.
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Old 02-24-2011, 10:21 AM   #8
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I definitely sounds as though you have excessive parasitic drain on the battery OR your alternator is not charging the battery back up after you drive it around. You could have something draining the battery but no visual ques to let you know something was left on.
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Old 02-24-2011, 11:27 AM   #9
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I would bet on it.

Try this..... take off the red (pos) battery lead from the battery. Place a test lamp on the pos battery post and the other side of the test lamp on the cable. Does the light go on? If so, something is on within the jeep. Ignition, dome light.... pump. The light should not come on.
We tried this no light.... what is next????
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Old 02-24-2011, 11:35 AM   #10
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We tried this no light.... what is next????
did you charge the battery first before the light test? If the battery is dead again, the test would show nothing. My YJ went almost dead on us until my wife looked in it in the dark one night and realized the CB was on...had slowly drained it down. The ignition key switch malfunctions, you can remove the key and still have power on auxiliary items. Now we know to wiggle the key before taking it out. One thing you can do if you have a meter, fully charge the battery, check the wattage on it (12-14 should be good) and then go driving around for an hour. Come back and check the battery power again. If it's dropped-then your alternator is the problem. Could be nothing more than a loose belt or broken cable end...or could be the alternator.
Autozone shops will test batteries, alternators, for free if you need testing done before replacing.
Could even be something like the brake light switch sticking on and you don't walk around the back end after getting out so you don't see them on...don't need a key in the switch for brake lights...
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Old 02-24-2011, 12:40 PM   #11
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my husband did what the guy said with positive cable and post there was no light. we are really at a loss on this one.
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Old 02-24-2011, 12:46 PM   #12
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the new battery is showing full charge, there is no drain on anything because it is all dead as if the new battery is dead.
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Old 02-24-2011, 03:42 PM   #13
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Battery cables can be intermittent, even though they may look good, the can have problems inside.
Use a jumper cable - one end on the engine, the other on the (-) battery post. If it starts replace the negative cable.

And try jumpering from the big terminal on the starter to the (+) post too.
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Old 02-24-2011, 04:11 PM   #14
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Buy a good meter and start troubleshooting rather than guessing what the problem is.
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Old 02-24-2011, 06:27 PM   #15
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Buy a good meter and start troubleshooting rather than guessing what the problem is.
Ron
Yeah, but that would take all the fun out of guessing. lol.

Ok, so the new battery is indeed fully charged, so the battery is no longer the issue.

The test light stays off with the positive terminal test. So there is no short within the vehicle.

Now the Jeep just refuses to crank or turn on lights at all even though it has new battery installed, correct?

So then the problem exists at the point of connection to the battery and or down stream from there.

FYI, my 05 TJ requires me to clean battery posts with wire brush every 6 months or so, because of build up, so clean the posts and cable connections carefully. Inspect the main cables carefully to make sure they are indeed in working order and not corroded from within. I believe your problem is the main cables somewhere, but its just a guess.
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Old 02-24-2011, 06:29 PM   #16
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Battery cables can be intermittent, even though they may look good, the can have problems inside.
Use a jumper cable - one end on the engine, the other on the (-) battery post. If it starts replace the negative cable.

And try jumpering from the big terminal on the starter to the (+) post too.

Yeah....what he said above.
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Old 02-25-2011, 03:58 PM   #17
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we tried this and it started,shut it off, tried it again it would turn over but not start. That makes us feel a little better, but we know it is going to cost us some major cash to get it towed and fixed at the jeep dealership. Something is messed up in the computer. Since it is a 2000.
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Old 02-25-2011, 04:59 PM   #18
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2 things that I would suggest before taking it in for service. 1) check your grounds and if you don't find anything wrong there 2) replace the cables. Cheapest first.
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Old 02-26-2011, 08:27 AM   #19
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I don't know what kind of Jeep you guys drive, but with the computer in it everytime you turn it over but it refuses to start you kill more of the computer. That is the only thing left to do in a 2000 6 cyl. Should have done this in the first place because now with checking all the fuses who knows what else is messed up in the computer.
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Old 02-26-2011, 11:13 AM   #20
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In my years of being a dealership mechanic I have never heard of destroying the PCM because it would not start.
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Old 02-26-2011, 11:25 AM   #21
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Why are you thinking it has something to do with the computer?

Did you try replacing the cables?
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Old 02-26-2011, 02:00 PM   #22
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The computer has absolutely NOTHING to do with the cranking system. Not any more than the color of the seats does or your great grandmother's dog's name.

It's the cables or connections.

Use the battery jumper cables as outlined here to find out which one.

Or you can drop $250+ having it towed to a dealer so they can replace the cables.
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Old 02-26-2011, 02:12 PM   #23
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I believe your problem is the main cables somewhere, but its just a guess.
If it is an automatic might try "shorting across" the starter with key off-just to see if it is somewhere between starter /and key /and battery. Once you have power back.

Believe best thing to do would be replace battery cables. Fairly cheap elimination of possible parts. And won't "hurt" anything - if it is old enough battery is "bad" cables could be suspect as well.
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Old 02-27-2011, 08:21 PM   #24
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Somehow, I am thinking there must be more to this story........ Computer? I dont think so.
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Old 02-28-2011, 08:54 AM   #25
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Our jeep has a PCM.
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Old 02-28-2011, 09:02 AM   #26
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Check that your battery connections are TIGHT. As the connectors on the battery cables wear, their inside diameter that fits around the battery post gets larger which means it can't get a tight enough connection around the battery to make a good solid and reliable connection. If the battery connection can be moved any at all by hand, the connector is too loose.

If it is too loose and you can't get it any tighter, reply back to this and I'll tell you how to easily get the connector tight around the battery post again within 5-10 minutes.
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Old 02-28-2011, 11:23 AM   #27
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I got your PM but I need to know about what I asked about in post #26 above first.
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Old 02-28-2011, 04:40 PM   #28
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I am pretty sure my husband knows how to tighten the clamp, but with this being a different vehicle type let me know how to tighten the clamp.
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Old 02-28-2011, 06:35 PM   #29
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i just had to replace the pos cable end because it was corroded inside the lead cable end itself. also check thecable end at the starter,i have seen them get very corroded by road salt etc. good luck.
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Old 03-02-2011, 02:35 PM   #30
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I am pretty sure my husband knows how to tighten the clamp, but with this being a different vehicle type let me know how to tighten the clamp.
I know this thread is probably done by now.... but as I reread it, it also sounds just like a loose connection to the ground. Intermittment and frustrating just like all electrical problems seem to be.

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