blew 2 60 amp fuses -
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Unread 05-02-2009, 02:05 PM   #1
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1994 ZJ 
Join Date: Jan 2008
Location: Taylor, Mi.
Posts: 7
blew 2 60 amp fuses

On my way home from fishing today I noticed my ammeter was way on discharge. When I checked my power distribution box under the hood, I had 2 blown 60 amp fuses. I replaced them and it blew the new ones. The fuses are labeled "alt. pwr. 1" & "alt. pwr. 2". This sucks because I had just decided to keep the Jeep another year or more. I replaced the engine control module 1 year ago and the alternator about 1 1/2 years ago. I had a problem with the Jeep "eating" batteries about every 5 months. Sams Club replaced the battery about 4 times. Then I had to replace the starter about 6 months ago and I also gave Sams the difference and put an Optima battery in it. Knock on wood, the battery has been holding up. That is, until today. I've got it on the charger now. I was just guessing that maybe the old starter was screwing up the batteries.
All this was so you would have a little history. Oh yeah, the Jeep is a 1994 Grand Cherokee Limited with the 5.2. Also, my ammeter is usually way over to the right, but was charging at 14 to 14.2 until today. When I replaced the 2 60 amp fuses it was charging at about 13.8 when I revved the motor, then it blew the new fuses. Thanks, any help would be appreciated.

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Unread 05-02-2009, 02:13 PM   #2
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1994 ZJ 
Join Date: Apr 2004
Location: chilton-haynes<$20
Posts: 2,450
take it to a parts store .... most check charging systems free... if you think it's the starter then you will have to take it off to test it
94 Grand Cherokee ... 332,000 miles
5.2 liter 242 :)
Rancho 5000 steering stabilizer
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Unread 05-02-2009, 02:16 PM   #3
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1998 ZJ 
Join Date: Jun 2008
Location: Ohio
Posts: 4,002
bad ground somewhere?
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Unread 05-02-2009, 04:28 PM   #4
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2004 WJ 
Join Date: Mar 2006
Location: outside chicago
Posts: 201
those are fuses for the alternator i would pull the alt and have it tested. just make sure they put a full load on it.
2004 WJ Freedom Edition w/4.7 H.O. heavily modded (sunk + totaled R.I.P. 9/06)
1998 TJ Sahara lifted, locked, and tons of crap bolted on (Sold)
1993 ZJ limited 5.2 (spare beater)
2004 WJ limited w/4.7 H.O. Addco rear bar, JK Rubi wheels
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Unread 05-02-2009, 08:35 PM   #5
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1995 ZJ 
Join Date: Jan 2008
Location: colorado
Posts: 2,457
I was thinking it is the alternator to.
95 ZJ, 5.2 V8,160,000 miles
Colorado Jeep Club member Pi
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Originally Posted by FPKites View Post
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Originally Posted by ZeeJay1997 View Post
Or just tie a 12 lb fish to a one foot pipe.
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Unread 05-02-2009, 10:32 PM   #6
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1999 WJ 
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Location: Aberdeen, MD
Posts: 647
either that, or you have a bad short somewhere (possibly inside the alternator?)

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