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Old 09-16-2012, 08:43 PM   #1
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Unhappy Dead jeep

I have a 2002 Jeep Wrangler 6 cyc that won`t start, I turn the key and get nothing, radio and inside fan came on and that was it. Thought is was a fuse checked all and they looked good so next I replaced the starter with a new one and put a charger on the battery, it was good and still won`t start. I checked this forum found it could be ignition problems so I replaced the ignition switch and actuator pin, still nothing. HELP PLEASE

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Old 09-16-2012, 09:18 PM   #2
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Have you checked and cleaned your battery terminals?

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Old 09-17-2012, 08:13 AM   #3
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Quote:
Originally Posted by HSHADOW96 View Post
I have a 2002 Jeep Wrangler 6 cyc that won`t start, I turn the key and get nothing, radio and inside fan came on and that was it. Thought is was a fuse checked all and they looked good so next I replaced the starter with a new one and put a charger on the battery, it was good and still won`t start. I checked this forum found it could be ignition problems so I replaced the ignition switch and actuator pin, still nothing. HELP PLEASE
First off welcome to the forum, you've come to the right place.

If you know your way around a VOM (VoltOhmMeter) that would be helpful. I hate to see people throw their hard earned money away swapping out parts that are not bad.

Confirm you have battery voltage with a voltmeter, position it where you can see it from the driver's seat. You should have around 12.2-12.6 volts DC. If you do not then no need to go any further until you determine the problem with your battery and/or connections or charge condition.

If you have good battery voltage then turn the key to the "RUN" position, you should see a very small voltage drop as the dash lights come on and the fuel pump primes. Once the pump quits running (it only runs for a couple of seconds to prime the system) then turn to the "START" position. Watch the VOM as you do this. The voltage should only drop to around 9.5-10 volts under normal circumstances and the engine is turning over. If there is no change in the voltage reading then you have a problem with either the start "switch" or the starter motor as the brushes are not grounding properly. It could also be a faulty ground cable but it would have to be completely disconnected for you not to have any reading.

If the voltage drops to say 4 or 6 volts then you have one of two problems. You have either a voltage drop in your positive or negative battery cable/connection/circuit or you have an internally shorted battery.

A cable connection is somewhat easy to track down if you know how to perform a voltage drop test. Place one lead of your VOM (DC Volts scale) on the positive post of the battery and the other lead on the terminal. Try again to start, as current is flowing across this terminal any added resistance from a bad connection will show up as a voltage reading. Normal on high voltage side is only about .2 volts DC. If you see one, two, four volts or more you have a bad connection.

If that checks OK, then proceed to the next connection point. Leave one terminal on the battery post and move the other lead to the next connection further away from the battery, such as the connection on the starter soleniod. Same procedure but this time you should only have .4 volts or less voltage drop. Keep going until you have checked the entire circuit all the way to the starter motor. Then move on to the negative cable and test in the same manner.

It actually sounds harder than it is, once you see how the meter works and move the leads around it goes fairly quick to perform this test.

I would almost bet you are going to find a connection in the negative cable where it mounts to the frame or between the frame and engine as these are common corrosion/poor connection points. Especially on Jeeps that see jarring and vibrations from off-road and extreme exposure to the elements.

I hope that helps somewhat. Keep us posted on what you find.

Mike.
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Old 09-17-2012, 06:22 PM   #4
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Battery is almost new, I used the volt meter on 50v DC and it goes to 30 and sits there even after turning on the lights, radio and fan on high needle didn`t move. When i turn the key to on position its turns on the dash lights and all the stuff above then i turn the key that last quarter inch to start it and it doesn`t do anything at all. Its like turning the key isn`t telling it to start or even to engage the starter. Install new starter and it made no different. with the key in the on position I did the screwdriver on the solenoid trick and it spins but not enought to engage it to start the engine. Which leaves me still clueless.
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Old 09-17-2012, 08:13 PM   #5
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I am stumped on the whole 30 volt thing. I think you may be reading the voltmeter incorrectly. Check which scale you are on vs. the one you are reading. You shouldn't be getting over about 13.2 volts max with the engine not running and alternator not producing voltage.

Put the ground lead on a good ground and then the positive lead on the starter solenoid terminal that the battery positive goes to just to confirm you have battery voltage there. Then put your positive lead on the smaller terminal marked "S" or "I" for Start or Ignition, some solenoids are marked differently. Have someone try to start it while you watch the meter. If the meter does nothing then you either have a serious ground issue between the battery and starter housing or you have an ignition switch that is bad and not sending the voltage to the solenoid.

Try that next and see what you get.

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Old 09-17-2012, 08:28 PM   #6
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You might wanna check your ignigition switch. Mine was shorting out and doing all kinds of weird stuff with the radio and ac. God knows what it could be doing to yours.
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Old 09-19-2012, 11:00 PM   #7
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Tonite I replaced the nuetral safety switch next to the trans, Checked all battery cables and connections while battery was at Auto Zone being checked and charged the little it was down. Rechecked all the relays and fuses again. plus all the stuff i replaced as stated above. Called my car alarm company they walked me thru disableing there alarm and still turn the key and get nothing. NO MAS, I GIVE ! Taking it to the repair shop tomorrow or friday, i`ll let ya`ll know.
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Old 09-19-2012, 11:12 PM   #8
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I replaced the ignition switch and ignition switch actuator pin, still nothing.
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Old 09-19-2012, 11:20 PM   #9
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And to make my life more difficult I have to 2 small nails in the back tire of my Harley, which when i called about having then pulled and patched i was told by harley dealers they don`t patch just install new tire. 250.00 for the tire and 100.00 labor to install it. I did run into alittle luck and found a like new tire on E-bay 40.00 bucks + 19.00 to ship it. Still have to pay to get it installed, that will be this weekend.
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Old 09-20-2012, 06:26 PM   #10
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I wouldn't play the lottery for a while!
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Old 09-21-2012, 11:58 PM   #11
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Jeep is running ! Well it was the Ignition switch actuator pin, which i did install correctly but it needed to turn the ignition switch about a 1/8" more and there`s no adjusting for that nor no adjusting the ignition switch which is held in place with only one screw. So we pushed it as far up and back as much as we could and used a couple of big thick zip ties and for now all is well. Thank ya`ll for all your help.
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Old 09-22-2012, 06:37 AM   #12
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Great to hear! Time for some off-roading I believe!
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Old 10-17-2012, 09:33 PM   #13
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Shadow how did you zip tie that ignition pin 1/8" further. Stumped. Only way I figured out that's what was wrong with my tj was this thread.
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Old 10-18-2012, 10:24 PM   #14
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Never mind on my last question. I just want to say thank you for this post. I tried everything and tested everything and decided to finally check the actuator pin. When I finally removed it, it was clearly broken. I ordered one and picked one up the same day at an autozone and installed it. Jeep runs again.

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