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Old 08-22-2011, 08:46 AM   #1
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Help Please

I have a 1998 Wrangler Sahara that i bought a couple months ago. When i bought it there was an aftermarket head unit and speakers in it. The speakers were garbage so I replaced them. After replacing them when I drive or turn the volume up past 20 the speakers will all cut out for different lengths of time. I thought maybe the head unit was bad so i replaced that and the speakers are still randomly cutting out. Does anyone have any idea what could be wrong that it keeps doing this? Its highly irritating and I'd like to get it fixed asap.

Thanks!!

Laura

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Old 08-22-2011, 11:42 AM   #2
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Sounds like one or all of your speakers are getting a short to ground somewhere in the speaker wiring. How badly did the PO butcher the stereo wiring harness? Do you have a soundbar with the squarish connector under the dash? On mine, the PO either removed the head unit by cutting off the harness, or some lowlife stole the head unit and cut the harness to get it out quickly.

If the squarish connector is still there under the dash, I would start by unmating that connector, ensuring both connectors are clean, and plugging them back together. Since all your speakers are cutting out, I would definitely check that connector.

-Brian

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Old 08-22-2011, 11:59 AM   #3
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Quote:
Originally Posted by bdheaton View Post
Sounds like one or all of your speakers are getting a short to ground somewhere in the speaker wiring. How badly did the PO butcher the stereo wiring harness? Do you have a soundbar with the squarish connector under the dash? On mine, the PO either removed the head unit by cutting off the harness, or some lowlife stole the head unit and cut the harness to get it out quickly.

If the squarish connector is still there under the dash, I would start by unmating that connector, ensuring both connectors are clean, and plugging them back together. Since all your speakers are cutting out, I would definitely check that connector.

-Brian
Thanks Brian. I thought maybe it had to do with the ground but the headunit stays lit up and on so someone told me that if that is the case it cant be the ground. My brother put the head unit in and used the same wiring harness that was already in there he just matched all the wires up, but it was doing this before he did that. I called one place and they said that the jeep came with a little stock amp somewhere and that it was garbage and it may have blown and thats whats cutting everything out. Have you heard of that? Do you know where its located or what it looks like?
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Old 08-23-2011, 11:40 AM   #4
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Laura,

The "short to ground" I'm talking about would be in the speaker wiring not the power ground to the head unit. Since the problem started after you swapped the speakers, that is where I would concentrate my detective work. Since it only happens when driving or related to volume, I recommend looking at connections. Both of those factors are related to vibration. Vibration issues are generally interconnection issues.

An amp failure happening right when you swapped the speakers would be a pretty interesting coincidence. I've got a YJ so I'm not familiar with the TJ subwoofer system. I assume there is an amp involved, but I don't know where it is located. There are lots of threads about stereo swaps on the forums. Might be a good place to search out info on the amp if you're speaker connections check out as good.

-Brian
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Old 08-25-2011, 11:11 PM   #5
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I would just run new speaker wires from the deck to speakers. That will fix the problem whether it is grounded speaker wires or stock amp interfering with the decks sound. The only time I've hooked up a stereo in a vehicle that had oem amp we bypassed it, so I don't know what happens when you run the decks power through said amp.
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Old 08-25-2011, 11:32 PM   #6
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not saying it is the same but my center console has my "sub" and amp--if that is where the problem is.

Depending on where the speakers were wired in to the harness it is possible that Brian is looking more the right way.

I realize the "stock" wiring is not that great but without having to up date wiring (knock on wood) I have added a sound bar with 6 speakers - two sets of sound pods and the upgrade for dash speakers and included the little tweeters at the same time. I did have to have my sub rebuilt about 6 months ago but that is very common.

65 on the interstate with the top off jammin' and being able to hear it is nice.
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Old 08-26-2011, 06:46 AM   #7
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Thanks Guys for all your help! After ripping the jeep apart we found that there is no amp. I think I'm going to have to rewire everything. I got it looked at yesterday and they couldnt find the problem b/c it cuts out randomly and didnt give them enough time to check the speaker wires. He suggested taking all the speakers back to eliminate that possiblity.
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Old 08-26-2011, 08:41 AM   #8
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If your speakers have passive crossovers (more than just a cap on the tweeter), most of them have protection built into them that will cause what you are describing to help prevent blown speakers.

What speakers did you install? Did they have a passive? (little box before the speaker--sorry if you knew that)
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Old 08-26-2011, 08:42 AM   #9
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Quote:
Originally Posted by lwills13659
Thanks Guys for all your help! After ripping the jeep apart we found that there is no amp. I think I'm going to have to rewire everything. I got it looked at yesterday and they couldnt find the problem b/c it cuts out randomly and didnt give them enough time to check the speaker wires. He suggested taking all the speakers back to eliminate that possiblity.
What kind of speakers do you have? The only other thought I have besides what I mentioned before, is if the speakers are pushing so hard that the wires are touching the basket and grounding out. I've had this happen on a subwoofer before. The speaker would push to its limit and the wire between the terminal and voice coil kept grounding out until it frayed and started shutting the amp off.

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