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post #1 of Old 05-07-2013, 10:57 PM Thread Starter
travisrda
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1984 CJ7 
 
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jeep died no electrical power

i need some help guys, so today i took my cj to work ran just fine started right up and runs great took it for a drive at lunch time worked just fine after work the wife and i went to dinner after dinner we went to get the kids at the mother in laws house and as i was leaving it just dies, no power to anything except the clock and thats it checked the fuses they were all good. Had to ge home to get the kids to bed so I had to leave the jeep there going to go work on it tomorrow just wanted some ideas about what you guys think it might be, thank for the help.

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post #2 of Old 05-08-2013, 12:20 AM
VooDoo2
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Solenoid, battery, terminals, fuseable link..
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post #3 of Old 05-08-2013, 12:46 AM
TomI
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Quote:
Originally Posted by VooDoo2 View Post
Solenoid, battery, terminals, fuseable link..
Fuseable link was the culprit when it happened to me...

Tom I.
'78 CJ7 (A 360 V8 powered mixed bag of parts)
'80 CJ7 (98% original and gonna stay that way)
'12 CTD 3500 Dodge (Tow rig and daily driver)
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post #4 of Old 05-08-2013, 12:53 AM
TIPPEDITOVER
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Another vote for fusible link
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post #5 of Old 05-08-2013, 02:02 AM
John Strenk
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Quote:
Originally Posted by travisrda View Post
i.... and as i was leaving it just dies, no power to anything except the clock and thats it. Checked the fuses they were all good. .....
Wait the clock works? Are you sure?
That is important cause if it does then some of the circuits that have power all the time should work.
Did you check or power with a test light or what?

Do the head lights work?

Could be something as simple as a loose ignition switch plug in that case.
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post #6 of Old 05-08-2013, 04:43 AM
BagusJeep
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Sounds strange, that you got power to the clock but nothing else.

I agree with most, sounds like a wiring / fusible link or even IGN LPS fuse issue but that clock is ticking??????? If it wasn't I would have assumed you had blown the fusible link, the ignition deenergised and you slid to a halt.

Here is a fairly easy to follow diagram of the power circuits. If you get a 12V test bulb and some long leads, hook one end to the battery negative and go looking for voltage, first of all at the fuse box.

However you can rule out a lot if a few other circuits still work. For instance does your horn work? Do your headlights work? Do your hazard lights work?
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post #7 of Old 05-08-2013, 04:56 AM
PROJECT 23
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I recently had a situation just like this, but my clock stopped ticking. I had no power to the dash, stereo, headlights or courtesy lights. Turns out my battery dropped a cell and wasn't holding a charge.
I changed out my starter, battery cables, solenoid and fusible link. In the end the culprit was the battery. Throw a meter on it and make sure it registers 12v or take it to the local auto parts shop to have them test it.
Kinda of strange that your clock is still ticking. After going through this same issue and getting help from fellow members, the fusible link doesn't seem like the culprit, but for $5 and 5 minutes of your time, wouldn't hurt to swap it out.
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post #8 of Old 05-08-2013, 05:51 AM
bkeese
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Clean the battery terminals!!!!!!!!!!!!!!!!!!!!!

1985 CJ7 - total customization underway, Sublime green and Plum crazy purple, Ford 9", 258 w/ Holley 475
1985,93 CJ7,YJ - L98 TPI Vette motor, Atlas twin stick, Dana 60s front and rear, Arbs, 39.5 Swampers
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post #9 of Old 05-08-2013, 08:05 AM Thread Starter
travisrda
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the thing that gets me is that it fired right up and as i was heading out their driveway its like someone shut everything off. I was under the dash trying to figure out if it was a blown fuse or not and the wife is the one said that the clock was working. i will head over there today with a test light to see what i can figure out.
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post #10 of Old 05-08-2013, 08:23 AM
walkerhoundvm
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Ecm?
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post #11 of Old 05-08-2013, 09:03 AM
bkeese
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I've seen this a hundred times. Let it sit and it will fix itself. It won't fire/dead battery and then 20 minutes it fires right up. It will fire up for a week and be dead again. If this is what is going on, clean the battery terminals first. It's cheap! Te second thing to do is clean the terminals of them ECM with jeweler's file. Corrosion will also produce the same problem. It happened to my wife and she had it towed to the jeep guru who changed the emc and computer for $500 and it happened again a month later.

Both are intermittent. If it isn't the battery terminals then do the Nutter Bypass (I believe that's the one to bypass the EMC and computer). I wish I had gone to an HEI single wire the first time it happened to me. Lesson learned.

1985 CJ7 - total customization underway, Sublime green and Plum crazy purple, Ford 9", 258 w/ Holley 475
1985,93 CJ7,YJ - L98 TPI Vette motor, Atlas twin stick, Dana 60s front and rear, Arbs, 39.5 Swampers
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post #12 of Old 05-08-2013, 10:04 AM
John Strenk
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The older CJ clocks will run for several minuets disconnected. They have a little solenoid inside that cranks a spring tighter, as it winds down, a switch makes contact again and rewinds the clock.

If the clock says "Quartz" it's different.

so,

who's betting a case of beer that it starts when he gets there???

So as to the loose/corroded battery terminals, I been there and started many a car with just a sheet metal screw driven down between the terminal and the clamp.
Now i just clean them up..

Hard to find those old post cleaners anymore....


I think they are in the plumbing department now....
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post #13 of Old 05-08-2013, 10:51 AM
bkeese
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John the pipe cleaning brush for copper plumbing pipe works for inside and a cheapo ss brush from Habour Feight works for the posts similiar to the red one above. They also make cheap plumbing pipe cleaners with wooden paddle handles.

1985 CJ7 - total customization underway, Sublime green and Plum crazy purple, Ford 9", 258 w/ Holley 475
1985,93 CJ7,YJ - L98 TPI Vette motor, Atlas twin stick, Dana 60s front and rear, Arbs, 39.5 Swampers
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post #14 of Old 05-08-2013, 12:51 PM Thread Starter
travisrda
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wouldn't it keep running though even if it is the battery? it should run off the alternator. also I have done the tfi /duraspark upgrade on it. i will take a battery brush with me though jic (just in case) can't hurt right?
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post #15 of Old 05-08-2013, 03:07 PM
Matt1981CJ7
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