in dash dvd/sub/amps fuse blowing

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=92412
Printed Date: May 23, 2024 at 12:44 PM

Topic: in dash dvd/sub/amps fuse blowing

Posted By: easbert
Subject: in dash dvd/sub/amps fuse blowing
Date Posted: April 02, 2007 at 12:51 AM

i have a nice system in my new car.. everything came installed and has been in the car for at least a year.. theres a jl audio w7 sub, a jl audio 500/1 amp powering the sub with a .5 farad cap, (all professionally installed) then theres two mtx amps powering jl audio speakers in the back, in the doors, and also tweeters. Then I have a clarion in-dash dvd player model vrx925vd... my problem is everything works great but out of no where the "back up radio fuse" (7.5 amp) under my hood blows... so I replaced it with a 7.5 fuse.. everything was working again for at least 2 days but out of no where again it blows (i didnt even have my stereo up loud at all) so I replaced it with a 10 amp fuse, 2 days later it blows... next was a 15 amp fuse and that one just blew today.. SOMEONE PLEASE HELP!! i dont understand why it would take 2-3 days for the fuse to pop! thanks

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eric

Replies:

Posted By: Mike M2
Date Posted: April 02, 2007 at 6:32 AM

I would suggest pulling the radio and look behind it for a possible short. Could be the battery wire has started rubbing against something...

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Mike M2
Tech Manager
CS Dealer Services

Posted By: KPierson
Date Posted: April 02, 2007 at 8:06 AM

Doubling the size of the fuse can lead to vehicle fires.

A 'slow' blow fuse would indicate excessive current on the wire. In this case, however, it seems more likely to be an intermittent short to ground.

You're best bet would be to put a current meter on the wire and see what kind of current it draws under 'normal' load. From that reading you can figure out which direction to go in.

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Kevin Pierson

Posted By: dman007
Date Posted: April 02, 2007 at 8:36 AM

I would start off by not putting bigger amped fuses in there, its 7.5 for a reason. To prevent from blowing up any components. You have a short someewhere in the system, meaning a power wire is being grounded out. I would start byt pulling out the radio and checking all the wires sometimes they get chaffed and ground out. It's happening every few days or so because the wires are getting jarred around and eventually touching ground.

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DTS Performance
St Petersburg, FL

Posted By: coppellstereo
Date Posted: April 02, 2007 at 10:30 AM

any idea where the system was installed? I would take it back there and let them work with it

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