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Old 08-10-2011, 09:08 AM   #1
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Fuse keeps blowing

I have a 97' Wrangler. I have replaced the 10amp fuse that is under the hood that controls most of the gauges when it went out about 2 months ago. Driving today it blew again and all gauges instantly stopped working including the radio. When I got home and checked it, it had blown again but this time when I went to replace it with a new fuse it sparked and immediately blew the new fuse as well. Any ideas?? Thanks!

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Old 08-10-2011, 09:15 AM   #2
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Sounds like you have a short somewhere. There is no easy fix for this aside from chasing wires to see if one has rubbed through the coating somewhere.

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Old 08-10-2011, 09:29 AM   #3
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Factory radio? If it's aftermarket try disconnecting the power wires( both red&yellow) because I don't think the radio is on the same fuse as the guage cluster.
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Old 08-10-2011, 09:37 AM   #4
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So should I just pull the dash apart and start checking the wires going back to the fuse box under the hood to see if a ground is off or if a hot wire has a pinch or something? Also the radio is an aftermarket but it goes out with everything else when the 10amp fuse blows. Kinda surprised that everything on the dash(ac/fan controls, all gauges and radio) are all connected to only a 10amp fuse. Could that be the problem as well as a short in a wire somewhere?
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Old 08-10-2011, 10:35 AM   #5
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Is it the Access. 2 fuse under the hood?
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Old 08-10-2011, 02:25 PM   #6
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@Rob76, Yes, I think that's the one. I'm just waiting for it to stop raining and I can confirm that with you. There is a 20 and a 10 and right next to it another 10 and 20.
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Old 08-10-2011, 02:48 PM   #7
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It's not uncommon for radios to have 2 sources of power.
1 for the clock & presets off of the dash lights and another for radio power.
Several of the after market radios in have had were like this.
If someone other then you installed the radio they might have cheated and just wired one circuit.

But it still sounds like you have a dead short. Look were the wires go thru the firewall.
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Old 08-10-2011, 02:53 PM   #8
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The radio has 2 sources of power. 1 is the on off switch. a low power wire that runs from your gauge cluster which is why no gauge, no radio... This is why the radio shuts off when you turn the car off. The other is the power wire to keep all your presets and settings when you turn the radio off.

Its been a long day so those might be backwards, but I know one is a switched power wire with the ignition circuit, and the other is an always hot wire for the memory of the radio.
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Old 08-10-2011, 03:00 PM   #9
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I would use an ohm meter and check that circuit to ground, also see if you can isolate circuits. Otherwise it could turn into a wild goose chase! Here is a link to a site that has online manuals for Jeeps.

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Old 08-10-2011, 04:27 PM   #10
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Thanks all for the advice and help. It's still raining here so I will have to start the search for the problem wire tomorrow but at least I know where to start now. And thanks MPjeep for the online manual.
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Old 08-10-2011, 05:14 PM   #11
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Unplug your radio, and your instrument cluster. Replace the fuse with a new one. If it pops you have a shorted out wire. If it doesn't pop then plug your radio back in. If it pops you've got a short in your radio or radio wiring. If it doesn't, then plug in your instrument cluster, if the fuse pops after you do that then you've got a short somewhere in your cluster.

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