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Old 08-04-2010, 09:18 PM   #1
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Electrical Problem?

Jeep Wont Start At All Put a brand new battery and alternator in there you name it. It drained overnight and wont let me turn it over. No clicking for the starter and when you open the door the lights dont even come on! Someone please help me im almost at my breaking point with this 1999 Jeep Wrangler TJ SE

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Old 08-04-2010, 09:34 PM   #2
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Do you have any after market electronics? Car starter,Stereo,CB etc? Remember also brand new batteries do not come with a full charge. Just because the alternator is new doesn't mean that it's good, I've gotten a few new "bad ones" in my time. So start by getting a boost, then get a volt meter and check if your alternator is charging while the engine is running. It should be putting out anywhere from 13 to 14.5 volts. If it is good check the volts at the battery, they will be low but should be coming up. Then start checking for the "parasitic drain" as it is called, if it totally drained your battery overnight I would have to assume it would be a major drain. Something along the lines of an amplifier or leaving on aftermarket spot lamps etc.

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Old 08-04-2010, 09:43 PM   #3
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To me it doesnt sound like it is your alternator or your battery that is the problem. You said you put in a brand new battery and alternator but what made you change them in the first place? When the battery was working, were you able to start the car and did everything run correctly? Was the alternator a new alternator or a rebuilt one? You can take both of those out and go to your local parts store and they should be able to hook them up and see if they are any good. It is not abnormal to get a bad battery or alternator right out of the box.

If those check good then something else is draining the battery while the car is off. Trouble shooting electrical problems is a tedious and timely process. Stick with it and you should be able to track down what it is. Check all of your connections to make sure they are sealed properly and then look to see if you have any hot wires that are making contact where they are not supposed to.
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Old 08-04-2010, 09:46 PM   #4
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Thanks, its really driving me to my breaking point because "Just Empty Every Pocket" is starting to become very apparent and i cant keep dropping money into it. Its weird, so if i close the doors and put jumpers on it, it will start, but if the doors are open it wont start. The battery gauge was dropping and going to the left before, and the check gauges light was coming on, now it goes to the right and the light comes on. Im running out of idea's we pretty much did a "parasitic" drain test on it. It came up normal but when i put the multimeter on battery you could see it draining as i was watching the meter, so correct me if im wrong but it sounds like a direct short? Im not a mechanic and i didnt really want to have to take it to a mechanic but its getting to that point.
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Old 08-04-2010, 11:46 PM   #5
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The volt gauge jumping around and check gauge light are indications of a low battery.

Make sure the key is in the "off" position when you remove it. Sometimes the ignition switch gets worn and you can remove the key in the "accessory" position which will drain your battery overnight.
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Old 08-05-2010, 10:14 PM   #6
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Quote:
Originally Posted by convict27 View Post
To me it doesnt sound like it is your alternator or your battery that is the problem. You said you put in a brand new battery and alternator but what made you change them in the first place? When the battery was working, were you able to start the car and did everything run correctly? Was the alternator a new alternator or a rebuilt one? You can take both of those out and go to your local parts store and they should be able to hook them up and see if they are any good. It is not abnormal to get a bad battery or alternator right out of the box.

If those check good then something else is draining the battery while the car is off. Trouble shooting electrical problems is a tedious and timely process. Stick with it and you should be able to track down what it is. Check all of your connections to make sure they are sealed properly and then look to see if you have any hot wires that are making contact where they are not supposed to.
Ya what I said.
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Old 08-05-2010, 11:04 PM   #7
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Get the battery charged.
Hook up the positive cable, like normal.
Then put a test light between the negative post and the negative cable - in series with it. If there's a drain somewhere in the electrical system, the test light will be on.
Pull fuses one at a time - the under dash and in the underhood relay/fuse box. - when the light goes out, that's the circuit to check.
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Old 08-05-2010, 11:30 PM   #8
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This may sound stupid but it has worked on MANY electrical issues.

Remove, Clean, Replace and re-tighten all the battery cables. Start with the battery terminals, then the relay box (this one is important, the two cables are under the covered plastic protector, clean it and make absolutely sure it't tight). Now before you go any further try starting it.....I bet it works fine.

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