how not to connect to a fused circuit
Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=93966
Printed Date: May 16, 2025 at 1:39 AM
Topic: how not to connect to a fused circuit
Posted By: KPierson
Subject: how not to connect to a fused circuit
Date Posted: May 16, 2007 at 10:02 AM
I came across this on another forum and thought it was interesting. I've never seen anyone do this before, which makes it special to me. 
Notice in the bottom left hand corner they have soldered wire to the top of the fuse, and apparantly melted the plastic away. ------------- Kevin Pierson
Replies:
Posted By: peterubers
Date Posted: May 16, 2007 at 10:10 AM
wow... seems like that would be very technically challenging to be able to solder a piece of wire like that ... what's more interesting is that you read japanese! ------------- The search function is your friend.
Posted By: KPierson
Date Posted: May 16, 2007 at 10:40 AM
Ha, I don't read Japanese, I just look at the pictures! ------------- Kevin Pierson
Posted By: KarTuneMan
Date Posted: May 16, 2007 at 11:54 AM
Thats a great set up.....IF you use an empty socket on the fuse box. Test both side of the socket, tap onto the side that has no juice. No problem.
-------------
Posted By: Ween
Date Posted: May 16, 2007 at 11:54 AM
hi, seen it before, done it too!...Accele i think sells fuses with wires tapped off the top side like shown. they aren't soldered however, (i think maybe spotwelded?) then the plastic case of the fuse is molded around the element part. assuming you use the lead off the fuse properly i.e. add an additional fuse and holder close to the fuse you decide to derive power from, i really don't see a problem with it. if the wire breaks, dead circuit. i wouldn't power anything critical to the operation of the vehicle from it though. just my two cents mark
Posted By: KPierson
Date Posted: May 16, 2007 at 1:03 PM
I would be OK with it if they were spot welded, and insulated. From the picture it looks like the wire is simply soldered through the melted plastic. There is no way in the world I would allow this in a customers car, let alone my own. It looks to me as if someone was just too cheap to buy the right parts.
-------------
Kevin Pierson
Posted By: KarTuneMan
Date Posted: May 16, 2007 at 1:42 PM
We use them for CB installes hand grind with a dremel, and solder. Works beautifully....
-------------
Posted By: KPierson
Date Posted: May 16, 2007 at 1:45 PM
Haha, what happens if the fuse blows? I would be one very unhappy customer if a shop did that to my car.
-------------
Kevin Pierson
Posted By: Ween
Date Posted: May 16, 2007 at 2:50 PM
as KartTuneMan notes, in an unused socket...if the fuse blows then the accessory added ceases to work. i'm not saying i do it every install but there are instances where it is quite convenient. m
Posted By: KPierson
Date Posted: May 16, 2007 at 4:22 PM
I guess I'm just used to going to the ignition wires and adding actual fuse holders, or tapping in to an already fused OEM circuit (like the cigarette lighter). I'm really surprised the connection holds up, solder isn't really designed to form a 'mechanical' connection like that. ------------- Kevin Pierson
Posted By: KarTuneMan
Date Posted: May 16, 2007 at 5:24 PM
KPierson wrote:
I guess I'm just used to going to the ignition wires and adding actual fuse holders, or tapping in to an already fused OEM circuit (like the cigarette lighter). I'm really surprised the connection holds up, solder isn't really designed to form a 'mechanical' connection like that.
??? -------------
Posted By: KPierson
Date Posted: May 16, 2007 at 5:36 PM
Solder should be used to make electrical connections, not mechanical connections. It has some strength, but not enough strength to use it in that fashion. This is why we twist wires together before soldering them. Wires soldered side by side have a fraction of the mechanical bond of wires twisted and soldered. The same thing applies to this situation here - soldering copper wire to a flat metal surface. I recently repaired a Milwaukee 18V drill battery where the spot weld had busted. I couldn't spot weld it back on so I figured I would try soldering it before throwing the battery away. The solder joint lasted 2 days, as I was soldering a metal buss bar to a metal battery - ie no mechanical connection between the two. ------------- Kevin Pierson
|