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post #1 of 9 Old 07-15-2013, 01:30 PM Thread Starter
thug3
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Fusible Link

I have an 89 Comanche 2WD 4.0 5 speed. Just replaced my fusible link for the second time in 2 weeks. upon investigation found positive battery cable to the starter completely melted. Don't know what caused this? When the link blows it kills the engine but everything else still works. Please help. Thanks

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post #2 of 9 Old 07-15-2013, 08:51 PM
cruiser54
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Have you replaced that melted cable? Is your starter covered in oil?

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post #3 of 9 Old 07-16-2013, 04:18 AM Thread Starter
thug3
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No not yet. I want to find out why it melted first so it doesn't melt a new one. And no, the starter isn't covered in oil. Maybe corrosion inside battery cable? Gonna check that Friday.
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post #4 of 9 Old 07-16-2013, 05:24 AM
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Got an ohm meter? Multimeter? Check the resistance between the ends of that melted cable.

If you own a Renix Jeep, you'll want to check this out.

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post #5 of 9 Old 07-16-2013, 05:37 AM Thread Starter
thug3
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Yes I do. I will check that. Also have a new cable to compare it to.
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post #6 of 9 Old 07-19-2013, 09:28 AM Thread Starter
thug3
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Checked the old cable and got same readings as new cable. Someone suggested the starter shorting out, but I haven't had any problems with it . Not dragging or anything. Once it starts the starter is out of the loop right? The only cable I haven't removed is the smaller one from the starter relay to the altenator. But it looks fine from what I can see of it.
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post #7 of 9 Old 07-21-2013, 01:19 PM Thread Starter
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I replaced the fusible link with 8 gage wire and a 30 amp thermal circuit breaker. Can't find anywhere that says what the amperage is for the fusible link. Worried I might have too high amp circuit breaker.
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post #8 of 9 Old 07-21-2013, 01:28 PM
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Quote:
Originally Posted by thug3 View Post
I replaced the fusible link with 8 gage wire and a 30 amp thermal circuit breaker. Can't find anywhere that says what the amperage is for the fusible link. Worried I might have too high amp circuit breaker.
I used to have that info from Jeep but lost it in a computer crash. Working on getting it again.

I had the info gauge vs amp rating. This is all I have now.

Which link blew?
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If you own a Renix Jeep, you'll want to check this out.

An index to over 30 write-ups can be found in the link below

www.cruiser54.com

My Jeep Technical Photos

http://www.cherokeeforum.com/g/album/1725214
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post #9 of 9 Old 07-21-2013, 11:19 PM
gus7
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ok get vom over the voltage and ohns if you have bad grounds, your alt can over charge - charging system needs looking too .....
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