Stupid question, should be an easy answer-Adding Relays - Page 2 - Rubicon Owners Forum
Reply
 
LinkBack Thread Tools
post #11 of 19 (permalink) Old 12-22-2007, 02:14 PM
Rubi Wheeler
 
John@4x4s-pod's Avatar
 
Join Date: Aug 2003
Location: California
Posts: 190
Circuit protection ,Circuit protection ,Circuit protection ,Circuit protection ,Circuit protection
You can not have enough!
Fuses and circuit breakers are your friend!

I will include an inline fuse with the stuff I send you.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

contact:

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

661-755-8139
Sponsored Links
Advertisement
 
post #12 of 19 (permalink) Old 12-22-2007, 02:26 PM
RubiconOwnersForum.com Premium
 
inline6's Avatar
 
Join Date: Oct 2006
Location: Atlanta, GA
Posts: 3,014
My setup includes a main fuse from the battery to the main power block. Fuses for the individual items or circuit breakers notice them next to the toggle switches.

2003 Rubicon, just PR 60s, COs, ...
2004 Dodge CTD, with stuff
2005 Rubicon LJ, stockish
2017 JKU sport, just UD60
inline6 is offline  
post #13 of 19 (permalink) Old 12-22-2007, 09:38 PM
RubiconOwnersForum.com Premium
 
DoctorD's Avatar
 
Join Date: Jul 2005
Location: Bullet Tree Falls, Cayo, Belize, Central America
Posts: 10,813
Re: This may be useful

[quote=Ken White]
Quote:
Originally Posted by DoctorD
Quote:
Originally Posted by "[email protected]":3l780ioq
No question is a "stupid" question....
Here is a basic wiring diagram that explains the Relay wiring for offroad lights.
The "A" configuration is probably what you want to use. PM me if you need any help or parts for your project (No charge)


Let me know if this helps.
Option B is a bad option for anyone since it'll put the entire load of the fog lights onto the headlight circuit and wiring.

It's also important to note the foglights are not to be wired in series as the diagrams show.
Doc is correct, the fog amps should be wired in parallel with the 12V positive and the fog lamps should not pull power through the high-beam switch...

[/quote:3l780ioq]

They're pulling power through the low beams, the high beams are on the control side of the relay. The fogs are on the NC side and they receive power from the power provided for the low beams, which is a very bad idea on any vehicle made today.




Captains log: Still alive, Sept 2015....If anyone needs me, send me an email to
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
I'll try to respond quickly! Find my
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
DoctorD is offline  
 
post #14 of 19 (permalink) Old 12-22-2007, 09:49 PM
RubiconOwnersForum.com Premium
 
DoctorD's Avatar
 
Join Date: Jul 2005
Location: Bullet Tree Falls, Cayo, Belize, Central America
Posts: 10,813
Here's my setup:



But it could be even better if done this way:




But if you're doing a whole new circuit overlay instead, I'd suggest jumpering terminals 30 to 86 on the new relay if the installer wishes to add a switch, and use the switch leg on the pin 85 side of the relay to ground. This way there's no need to tap into the interior for power and no need to run a power wire through the firewall, the switch can work the ground side of the relay. It's safer, cheaper AND easier.

Like this:






Captains log: Still alive, Sept 2015....If anyone needs me, send me an email to
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
I'll try to respond quickly! Find my
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
DoctorD is offline  
post #15 of 19 (permalink) Old 12-22-2007, 10:43 PM
RubiconOwnersForum.com Premium
 
Ken White's Avatar
 
Join Date: May 2003
Location: Lake County, OH
Posts: 2,766
Garage
Re: This may be useful

Quote:
Originally Posted by DoctorD
They're pulling power through the low beams, the high beams are on the control side of the relay. The fogs are on the NC side and they receive power from the power provided for the low beams, which is a very bad idea on any vehicle made today.
Doc, its really irrelevent whether the power is pulled from the high beam or low beam side since the lights should not be powered through a switch that doesn't have its switch contact ratings sized correctly...

As for switching the ground side as shown in your Figure A, it is better to switch the hot wire since there will be less wire length having 12VDC applied to it when it is not switched to the on position which means there is less chance of accidently shorting a wire/terminal out when testing or during a failure mode... Put the switch on the other side of pins 30/86 and fuse it as near to the 12VDC (+) terminal as possible.


'03 Rubi with a few mods...
'08 Dodge Cummins to tow the Rubi...
Ken White is offline  
post #16 of 19 (permalink) Old 12-22-2007, 11:05 PM
RubiconOwnersForum.com Premium
 
DoctorD's Avatar
 
Join Date: Jul 2005
Location: Bullet Tree Falls, Cayo, Belize, Central America
Posts: 10,813
Re: This may be useful

Quote:
Originally Posted by Ken White
Quote:
Originally Posted by DoctorD
They're pulling power through the low beams, the high beams are on the control side of the relay. The fogs are on the NC side and they receive power from the power provided for the low beams, which is a very bad idea on any vehicle made today.
Doc, its really irrelevent whether the power is pulled from the high beam or low beam side since the lights should not be powered through a switch that doesn't have its switch contact ratings sized correctly...
I had already agreed.

Quote:
Originally Posted by Ken White
As for switching the ground side as shown in your Figure A, it is better to switch the hot wire since there will be less wire length having 12VDC applied to it when it is not switched to the on position which means there is less chance of accidently shorting a wire/terminal out when testing or during a failure mode... Put the switch on the other side of pins 30/86 and fuse it as near to the 12VDC (+) terminal as possible.

We can agree to disagree on this. The setup I posted can be located AT the battery, with ONE fuse and the trigger wire is safe unfused if done on the ground side. Then, a single 30A fused wire from battery to relay, short 1" jumper to the control side, and the output to the fogs is extremely simple and safe, the switch can be wired with 18ga and grounded to the dash bracket.

Switching the hot side requires a switch fuse and two "hot" wires...one 30A for the fog source and one 3A for the switch.




Captains log: Still alive, Sept 2015....If anyone needs me, send me an email to
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
I'll try to respond quickly! Find my
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
DoctorD is offline  
post #17 of 19 (permalink) Old 12-23-2007, 11:20 AM
RubiconOwnersForum.com Premium
 
Ken White's Avatar
 
Join Date: May 2003
Location: Lake County, OH
Posts: 2,766
Garage
Re: This may be useful

Quote:
Originally Posted by DoctorD
We can agree to disagree on this. The setup I posted can be located AT the battery, with ONE fuse and the trigger wire is safe unfused if done on the ground side. Then, a single 30A fused wire from battery to relay, short 1" jumper to the control side, and the output to the fogs is extremely simple and safe, the switch can be wired with 18ga and grounded to the dash bracket.

Switching the hot side requires a switch fuse and two "hot" wires...one 30A for the fog source and one 3A for the switch.
Doc, fuses are sized/used to protect the wiring insulation from melting if a short occurs. So even if you switch the ground, a smaller fuse should be used to ensure this larger gauge wiring is protected too. You can't rely on the coil in the relay to limit the current in the switch and wiring to a safe value - coils have been know to short across winding and contacts have been known to short across terminals...

You could also use one fuse if the same gauge wiring is used through out the installation...

I guess we will agree to disagree.

Have a Merry Christmas...


'03 Rubi with a few mods...
'08 Dodge Cummins to tow the Rubi...
Ken White is offline  
post #18 of 19 (permalink) Old 12-23-2007, 11:30 AM
RubiconOwnersForum.com Premium
 
DoctorD's Avatar
 
Join Date: Jul 2005
Location: Bullet Tree Falls, Cayo, Belize, Central America
Posts: 10,813
Re: This may be useful

Quote:
Originally Posted by Ken White
So even if you switch the ground, a smaller fuse should be used to ensure this larger gauge wiring is protected too. You can't rely on the coil in the relay to limit the current in the switch and wiring to a safe value - coils have been know to short across winding and contacts have been known to short across terminals...

You could also use one fuse if the same gauge wiring is used through out the installation...
That was the idea, but I see your point!

The ground switching does shorten the length of the "live" wires though.

Merry Christmas!




Captains log: Still alive, Sept 2015....If anyone needs me, send me an email to
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
I'll try to respond quickly! Find my
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
DoctorD is offline  
post #19 of 19 (permalink) Old 12-23-2007, 11:42 AM
RubiconOwnersForum.com Premium
 
Ken White's Avatar
 
Join Date: May 2003
Location: Lake County, OH
Posts: 2,766
Garage
Re: This may be useful

Quote:
Originally Posted by DoctorD
...The ground switching does shorten the length of the "live" wires though.

Merry Christmas!
True...


'03 Rubi with a few mods...
'08 Dodge Cummins to tow the Rubi...
Ken White is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Rubicon Owners 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:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
question on locker mod that I cannot find my answer for treadway47025 TJ Communications And Electronics 0 06-01-2008 10:18 PM
no bs answer for a bs question SBS TJ Suspension and Steering, Tires and Wheels 32 08-07-2006 03:47 PM
HEALTH QUESTION & ANSWER SESSION N7COF Humor 2 06-07-2006 01:08 AM
How to answer stupid questions fyathyrio Humor 4 02-20-2006 04:45 PM
Rear seat question(That I should already know the answer to) o|||||||o General Tech 14 04-06-2005 05:36 PM

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 On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome