Dash light fuse blows after stereo installation? - Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > General Jeep Discussions > General Jeep Discussion

Join Wrangler Forum Today

Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 03-17-2013, 05:53 PM   #1
JakePurvis's Avatar
Join Date: Jul 2012
Location: Tampa, FL
Posts: 1,440
Dash light fuse blows after stereo installation?

A buddy and I installed my first aftermarket stereo and speakers a few months back, and while driving to test them out, my dash light blew. We put another 5 Amp fuse in and it blew as well. What's going on? It's grounded correctly and no wires are crossing, so what's the deal?
JakePurvis is offline   Quote
Old 03-18-2013, 09:56 AM   #2
Join Date: Mar 2011
Posts: 438
The deal is, the 5 amp fuse is sized to protect the instrument cluster only, and with your radio stealing power from the dash, the fuse blows because at higher volumes, the radio plus instruments consumes more than 5 amps.

Putting in a larger fuse is a very bad idea, as it would no longer protect the instruments, in the worst case the oversized fuse would allow an electrical short in the instrument cluster with the radio turned off to start a fire behind the dash.

The correct answer is to run a new wire all the way to the battery (+) connection, with an inline fuse to protect the radio. Chances are good that the radio wiring harness had that fuse in it already - it is up to you to route the wire to someplace where you could check and replace that fuse.

If you MUST steal power from inside the Jeep, steal it from something else like the lighter socket, which has power to spare and a 20A fuse. But it's a bad idea, since either the lighter or radio could blow the fuse, and if you were playing the radio loud and then pushed the lighter in, the fuse would blow. That is the whole idea with fuses, normal current doesn't blow the fuse, extra current draw does.

1967 Kaiser Commando
2001 Grand Cherokee WJ
2003 Rubicon TJ
KaiserJeep is offline   Quote
Old 03-20-2013, 04:58 PM   #3
JakePurvis's Avatar
Join Date: Jul 2012
Location: Tampa, FL
Posts: 1,440
Okay, I think I got it. Thanks man!
JakePurvis is offline   Quote

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Download our Mobile App

» Featured Product

All times are GMT -5. The time now is 01:04 AM.

User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2016 DragonByte Technologies Ltd.

Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC