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Old 05-22-2012, 05:05 PM
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Question Glass fuse on firewall under hood

Hey guys,
Our 93 jimmy was acting funny, the transmission was shifting hard and stuff. I found a glass fuse along the firewall blown. It was rated at 30 amps, and the wires going to it are red with a white stripe. It is not marked, and I do not know what it goes to. Is this the transmission fuse that everyone is always talking about? I plan on replacing this in-line glass fuse with a blade type, or a quick acting 25 amp circuit breaker. Somebody help me identify this fuse please.
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Old 05-30-2012, 10:35 AM
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I belive glass fuse had been phased out well before 93, i may be wrong but i think someone had to have put that there and not the factory.
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Old 05-30-2012, 02:49 PM
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picture may help. my 93 transmission keeps blowing my ign/gau fuse then it wont shift. i dont recall their being any fuses back there
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Old 05-30-2012, 08:51 PM
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The glass fuse, sounds like something that would be for an amp on an after market stereo.
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Old 06-02-2012, 02:45 AM
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stereo fuse. The one side prolly goes.straight to the battery, and the other end is grounding under the carpet in the trunk to blow the fuse. Dont replace unless you are hooking up a stereo.
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Old 06-03-2012, 02:45 PM
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Thanks for all the replies everyone. I will get some pics of the firewall area posted as soon as possible. It does not look to be aftermarket installed. There is a black shunt looking thing that this glass fuse was getting its power from. I have already installed my circuit breaker mod, and the transmission problem has gone away.

Like I said, the wire is red with a white stripe. Not too many aftermarket wire is sold with stripes on it. Pictures soon, I promise.
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Old 06-07-2012, 05:00 PM
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As I recall, it goes to the underhood lamp.
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Old 06-08-2012, 12:00 PM
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Really? interesting, My underhood lamp just has the wires that goes into the cluster of wires, no fuse that I have seen. Did not really pay attention to it though
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Old 06-11-2012, 10:09 PM
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I was at the junkyard today getting some oil lines for the Jimmy, and while I was there, studied the firewalls on many jimmys and blazers in the yard. Some had the 10 guage red wire with the white stripe, however, none of them had the in-line glass fuse. I have concluded that the wire must be the power wire for the transmission. I also believe the glass fuse was factory. It did not appear to be added aftermarket. I've seen plenty of wiring in my many years and i can tell the difference between factory and aftermarket. My cicuit breaker mod seems to be doing fine. No tranny problems yet.
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Old 06-11-2012, 10:33 PM
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kinda ironic. i was working on my 1990 fullsize at work and there was actually a bus fuse near the the passenger side firewall behind the junction cover. it was for the little retractable work light that they bolt to the fender
Old 06-11-2012, 10:33 PM
 
 
 
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85, 96, amprage, chevrolet, fire, fuse, fuses, glass, gmc, hood, jimmy, light, replace, truck, trucks, wall, year


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