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Unread 01-19-2011, 04:52 PM   #1
anderson5290
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1998 XJ Cherokee 
 
Join Date: Jun 2010
Location: Corona
Posts: 367
Blowing fuses?

I have a 1990 xj 4.0. I went less than a quarter mile to get some food the other day and while I was waiting I shut my jeep off. When I went to turn it back on, I heard a click in the engine bay. Just one. It sounded like a fuse had blown to me. After that my jeep wouldnt even turn over and my oil pressure gauge was wayyy past 80. As far as it could go basically. Therefore I had to be pulled home. So I changed the 4 square fuses on the passenger side of the engine bay and it started back up no problem. But it did the exact same thing today. I was actually doing a flex test on my tree and it wouldnt start at the top. So I rolled down in neutral with the engine off and it started back up after that and the oil gauge was back to normal. Anybody know why it would b doing this or what fuse is blowing? (if thats the problem)

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Unread 01-19-2011, 04:54 PM   #2
PlatinumNiner
Web Wheeler
1998 ZJ 
 
Join Date: Oct 2009
Location: Long Island NY
Posts: 2,724
You reolaced 4 fuses with out checking them? Check them and see which is blown, that will give you a hint as to whats causing the problem.
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Unread 01-19-2011, 05:11 PM   #3
anderson5290
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1998 XJ Cherokee 
 
Join Date: Jun 2010
Location: Corona
Posts: 367
They are the square 5 prong fuses. If it was a regular fuse, of course I would check it before replacing it. I just changed all 4 cuz I had 4 extras. And by the look of the fuses none looked burnt or blown
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Unread 01-19-2011, 05:13 PM   #4
PlatinumNiner
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1998 ZJ 
 
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Yea those werent fuses those were relays.
relay.jpg  
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Unread 01-19-2011, 05:17 PM   #5
anderson5290
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1998 XJ Cherokee 
 
Join Date: Jun 2010
Location: Corona
Posts: 367
Ohh ok. Relays. My bad. Well I just took all 4 out 1 by 1 and turned the ignition to ON and my pressure gauge did not shoot up like that for either. So that leads me to believe the problem is elsewhere
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Unread 01-19-2011, 05:20 PM   #6
PlatinumNiner
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1998 ZJ 
 
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Location: Long Island NY
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I believe you have a starter relay right behind the battery its easy to see its silver metal and has a big lug on it that acts as a distrobution block for your power wires off your battery. Thats the first place id check.
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Unread 01-19-2011, 05:25 PM   #7
anderson5290
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1998 XJ Cherokee 
 
Join Date: Jun 2010
Location: Corona
Posts: 367
Yes sir. I just put a brand new one on not too long ago. Unless it a faulty part it should b good. Also as I was driving last nite, my lights were dimming and I could see my battery gauge moving from between about 10 and 13. It has 2 optimas so its not lacking battery power
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Unread 01-19-2011, 05:32 PM   #8
PlatinumNiner
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1998 ZJ 
 
Join Date: Oct 2009
Location: Long Island NY
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Unless your alternator, engine, battery gounrds are going or the huge problematic junction on the firewall is going. Check that the wiring on the starter relay is all good and tight then id go after battery cables and grounds.
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