View Full Version : Electrical Problem
03-21-2012, 02:55 PM
Yeah, so, as the title says I have an electrical problem with my 1995 Jeep ZJ Laredo. I have no clue what it is, but I will explain. Whenever I try to start it, it doesn't start at all, no clicking, no nothing. But, when I hook cables up to it, it runs but at low battery (because of the bad battery), but the second you take the jumper cables off of the truck it shuts down immediately like no hesitation at all. Also I bought the alternator from AutoZone re-manufactured, so I don't know if that's it. And I don't wanna spend another 100 something dollars on something I really don't need for the truck at all. If someone can help me with my truck and fix it for me there is money involved and I will pay for the gas money to come out to my house since my truck move anywhere. Whoever can help me with this I will be extremely grateful and remember there is $$$ involved. Message me on here or respond to here. Thank You.
03-21-2012, 09:25 PM
Off the top of my head, get the truck running and every thing electrical on..Take a screw driver and place it near the rear shaft bearing on the alternator..Its on the back of the case..With the engine running you should feel the magnetic pull towards the bearing shaft..When the alternator is charging there is an electro magnetic field being created so you need to check for that. ITs best to have the battery checked and charged up fully first..Depending on what you have to charge it hit it with a high amp charge for ten minutes then use a low amp setting around 6 amp or 2 amps over night..Try to get the battery voltage at least to 12.8 volts before you reinstall it.
This is after you check all your terminals for corrosion and make sure they are clean and tight
03-21-2012, 09:42 PM
Duralast is duracrap. I dont like there parts and its cheap chinese lowest bidder type stuff. But i dont think thats the issue anymore. If the alternator went bad and wore down the battery and killed it. You need a good battery. The ZJS cant idle with low voltage and even if the alternator is charging the lack of good voltage from the battery freaks out the ECM. Trya new batteru or borrow a good one and try it if you dont want to buy a battery until you are sure. Install a good one and the truck will want to stall until the ECM relearns. May take up to 5 minutes holding it at 1500 RPMs or a little higher to relearn. And you will have to gradually lower the RPMs untill its at idle.
May sound strange but the relearn thing is a common problem on the ZJs. But yet the XJs didnt act up as bad.
03-21-2012, 09:45 PM
^^^What they said...
A buddy of mine is having simular issuse with his WJ, but when he wiggles the battery cables it will start or if he waits 5 seconds with the key in the run possition before starting.
Dont know if they can be related or not, but I will be sending him the link to watch and see what happens and give him some ideas on how to fix his issue.
03-22-2012, 06:12 PM
Charge the battery with a tender. I just took a battery out of my ZJ because it was dead. I'll charge it up and see if it holds a charge.
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