12v seat heater wiring question.. - Jeep Wrangler Forum
Jeep Wrangler Forum

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

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 04-20-2013, 01:32 AM   #1
Jeeper
 
DNKC's Avatar
 
Join Date: Jul 2012
Location: Independence MO
Posts: 248
12v seat heater wiring question..

I'm not an expert on wiring, I think what I want to do will be fine but I wanted to ask here to see if I am missing something.

I have new seats with seat heaters for the front that I am installing tomorrow.
The heaters are two wire to each seat, hot and ground. They both run off their own wires and switches, and they both come with inline fuses 7.5a fuses.

My situation is this: I previously ran a bundle of 5 wires from behind the battery through a grommet & split loom through the firewall to behind the glovebox where the fuse panel is. These wires are to be used to run 12v accessories off the battery.

My question is: If I use an inline fuse on ONE of these wires at the battery (say a 15a fuse), can I use that same one wire to split off and run BOTH the hot leads for both heated seats with their 7.5a inline fuses.

In other words, can one fused wire from the battery run both fused wires for the heated seats? Or do I have to run individual hot leads from the battery for each seat?

I'd much rather use one of my accessory wires to run both seats then two.

DNKC is offline   Quote Quick Reply
Old 04-20-2013, 01:48 AM   #2
Jeeper
 
carlosfangdango's Avatar
 
Join Date: Feb 2013
Location: Auckland, NZ
Posts: 15
Hi, yes you can as long as the cable is rated for the higher current. I you are adding a few accessories you might be better off getting a small fuse board that you could mount somewhere. You would then be treating the supply cable as a sub main. Only drawback would be if you overloaded the sub main and popped the fuse all your accessories would go out.

carlosfangdango is offline   Quote Quick Reply
Old 04-20-2013, 01:55 AM   #3
Jeeper
 
RUBI 4 MY MRS's Avatar
 
Join Date: Feb 2011
Location: California/Nevada
Posts: 1,391
You should be fine as long as the wire from the 15a fuse is big enough to carry the potential 15a load. Then of course you still need the 7.5a fuses to each seat at the junction where they branch from the single wire. Wire size depends on load (amps), voltage, length of the wire (distance) & allowable voltage drop. Do a search for the ampacity of wire be sure it is for 12v.

I think this one has what you need.

Ampacities for wire
__________________


'05 Rubi TJ Unlimited
'93 Toyota 4Runner
RUBI 4 MY MRS is offline   Quote Quick Reply
Old 04-20-2013, 02:20 AM   #4
Jeeper
 
n00g7's Avatar
 
Join Date: Apr 2013
Location: Northern VT // Western Wisconsin
Posts: 1,995
The reasoning for the above is, if your hot wire touches ground, you want it to carry enough current to pop the fuse. If it doesn't carry enough current to pop the fuse, FIRE!
n00g7 is offline   Quote Quick Reply
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Jeep Wrangler Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools

Posting Rules
You may post new threads
You may 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

» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 05:37 AM.



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