the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
icon

fuse size or a short, boat


Post ReplyPost New Topic
< Prev Topic Next Topic >
smelkin 
Member - Posts: 3
Member spacespace
Joined: June 11, 2007
Location: United States
Posted: June 12, 2007 at 8:26 AM / IP Logged  

Good day,

I inherited a boat with a Kenwood KDC s2009 CD/AM/FM radio. 

BACKGROUND

Everything else regarding electronics works fine on the boat (gauges, GPS, etc.).  Just got around to looking at the radio wiring and discovered a blown fuse inline from the back of the HU to the terminal block behind the dash.  The HU has a larger gauge red wire that houses a smaller gauge red and a yellow wire.  That smaller gauge red wire has an inline (cylinder fuse) 250V 3amp.  So I replaced the fuse with same, heard the CD motor in the unit spinning, it ejected a CD (nothing good btw) and then there were no lights on the HU display.  So fine, I press PWR on the unit, the display comes on, I here static and a station for a few seconds, then the fuse blows again.  So I put another fuse in, same behavior.  Key is not in ignition during this evolution.

So here are my questions, does a 3 amp fuse sound appropriate for a kenwood car stereo that says 4 x35w (in other words, did previous owner just use the wrong fuse)?  If it is a short, would it not trip immediately (why wait a few seconds?).  I am a newbie when it comes to car stereos, so any expertise on how to appropriately troubleshoot would be wonderful.

Thank you

slightly clueless, but learning
haemphyst 
Platinum - Posts: 5,054
Platinum spaceThis member has been recognized as an authority in Electrical Theory. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spacespace
Joined: January 19, 2003
Location: Michigan, Bouvet Island
Posted: June 12, 2007 at 11:00 AM / IP Logged  
I would say that no, a 3A is not adequate, this is why the delay between turning on, and blowing. Try a 10A, or if necessary, a 15A, but try the 10 first. Voltage rating won't be quite so important, but be certain it is at least 12V... (they all will be, though, so just remember that the current rating is the goal of your quest, here, and don't worry about the voltage so much.)
This will likely solve your issues.
It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."
smelkin 
Member - Posts: 3
Member spacespace
Joined: June 11, 2007
Location: United States
Posted: June 20, 2007 at 2:37 PM / IP Logged  

Have since used a flashlight and see that red wire (one with the fuse here) has 1amp printed on the wire...so back to the drawing board. 

Don't think I want a 10amp fuse inline with a 1amp wire.

slightly clueless, but learning
DYohn 
Moderator - Posts: 10,741
Moderator spaceThis member has made a donation to the12volt.com. Click here for more info.spaceThis member has been recognized as an authority in Electrical Theory. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spacespace
Joined: April 22, 2003
Location: Arizona, United States
Posted: June 20, 2007 at 3:44 PM / IP Logged  
If the fuse is on the main power wire, it is supposed to be 10 amps.
Support the12volt.com
haemphyst 
Platinum - Posts: 5,054
Platinum spaceThis member has been recognized as an authority in Electrical Theory. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spacespace
Joined: January 19, 2003
Location: Michigan, Bouvet Island
Posted: June 20, 2007 at 3:46 PM / IP Logged  
smelkin wrote:

Have since used a flashlight and see that red wire (one with the fuse here) has 1amp printed on the wire...so back to the drawing board. 

Don't think I want a 10amp fuse inline with a 1amp wire.

You're right about that. You said it was a red wire... Is there a YELLOW wire as well? The red wire is usually the ignition or accessory wire, the larger yellow one will be the main power wire.
It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."
smelkin 
Member - Posts: 3
Member spacespace
Joined: June 11, 2007
Location: United States
Posted: June 20, 2007 at 3:59 PM / IP Logged  
Yes, my apologies, there is also a yellow wire coming out of the HU, seems to have a square fuse assembly there.
slightly clueless, but learning
haemphyst 
Platinum - Posts: 5,054
Platinum spaceThis member has been recognized as an authority in Electrical Theory. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spacespace
Joined: January 19, 2003
Location: Michigan, Bouvet Island
Posted: June 20, 2007 at 5:56 PM / IP Logged  
Ah... The yellow wire is the wire with all the power for the deck. It traditioanlly goes to a "constant" or "battery" lead, not through the ignition switch. IT should have the 10 to 15A fuse in it, and the red wire will be perfectly safe with a 1A fuse in it. If you are continuing to blow this particular fuse, then my guess is that there is something wrong with the deck. I've never seen an accessory lead have anything bigger in it than a 3A.
It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."

Sorry, you can NOT post a reply.
This topic is closed.

  Printable version Printable version Post ReplyPost New Topic
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot delete your posts in this forum
You cannot edit your posts in this forum
You cannot create polls in this forum
You cannot vote in polls in this forum

  •  
Search the12volt.com
Follow the12volt.com Follow the12volt.com on Facebook
Thursday, May 23, 2024 • Copyright © 1999-2024 the12volt.com, All Rights Reserved Privacy Policy & Use of Cookies
Disclaimer: *All information on this site ( the12volt.com ) is provided "as is" without any warranty of any kind, either expressed or implied, including but not limited to fitness for a particular use. Any user assumes the entire risk as to the accuracy and use of this information. Please verify all wire colors and diagrams before applying any information.

Secured by Sectigo
the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
Support the12volt.com
Top
the12volt.com spacer
the12volt.com spacer