Which wire on transfer case to ground for locker bypass? - JKowners.com : Jeep Wrangler JK Forum
 
LinkBack Thread Tools Display Modes
post #1 of 11 Old 02-10-2015, 11:52 AM Thread Starter
Wheeler
 
Join Date: Feb 2015
Location: Helena. MT
Age: 69
Posts: 12
Feedback: 0 reviews
Which wire on transfer case to ground for locker bypass?

A while back, a poster mentioned that we could bypass the 4-Lo locker restriction by grounding one wire at the t-case. I'd like some help in finding the relay/wire. The thread is at https://www.jkowners.com/forum/showthread.php?t=2212. Doing so would allow me to use the lockers in 4-Hi/Lo, but keep the stock switch setup. I posted this question to that thread, but it's kind of old so I thought I'd ask here. I also need to figure out whether it'll work with a 2015 HR. Thanks.
JimmyW is offline  
Sponsored Links
Advertisement
 
post #2 of 11 Old 02-10-2015, 12:05 PM
Rock God
 
Guruman's Avatar
 
Join Date: Feb 2010
Location: Thompson Falls, Montana
Age: 48
Posts: 1,148
Garage
Feedback: 0 reviews

I think he was asking.... And I suspect the answer is no. With the way CANBUS works in these newer Jeeps the "signal" from the t-case is likely not just a simple ground, but maybe.

_
'76 CJ-7, '43 CJ-2a, '78 Bronco,'78 CJ-7, '75 CJ-5, '78 CJ-7, '80 CJ-7, '78 SJ, '79 SJ, '78 and a '76 FJ-40 , '90 XJ, '91 XJ, '86 CJ-7, '95 ZJ, '68 CJ-101 Commando, '00 TJ, '68 M-715, 2 '86 Military Blazers, '96 LR Discovery, '86 CJ-7, '91 YJ, '99 TJ, 07' JKU Rubi, 1988 YJ, 1973 Commando, 3 Diesel Excursions....
Now back to a 2013 JKU Rubicon with "stuff", planning 37's with minimal lift.

I've tried them all... Jeeps are still the best. (0||||0)
Guruman is offline  
post #3 of 11 Old 02-10-2015, 12:08 PM
Rock God
 
Guruman's Avatar
 
Join Date: Feb 2010
Location: Thompson Falls, Montana
Age: 48
Posts: 1,148
Garage
Feedback: 0 reviews

It's also worth noting that putting it into low range does more than make the 4x4 light come on. Engine parameters, shift points, ETC inputs, all change based on the 2H-4H-4L selection. I'm not sure it'll like being "tricked".

_
'76 CJ-7, '43 CJ-2a, '78 Bronco,'78 CJ-7, '75 CJ-5, '78 CJ-7, '80 CJ-7, '78 SJ, '79 SJ, '78 and a '76 FJ-40 , '90 XJ, '91 XJ, '86 CJ-7, '95 ZJ, '68 CJ-101 Commando, '00 TJ, '68 M-715, 2 '86 Military Blazers, '96 LR Discovery, '86 CJ-7, '91 YJ, '99 TJ, 07' JKU Rubi, 1988 YJ, 1973 Commando, 3 Diesel Excursions....
Now back to a 2013 JKU Rubicon with "stuff", planning 37's with minimal lift.

I've tried them all... Jeeps are still the best. (0||||0)
Guruman is offline  
Sponsored Links
Advertisement
 
post #4 of 11 Old 02-10-2015, 12:18 PM Thread Starter
Wheeler
 
Join Date: Feb 2015
Location: Helena. MT
Age: 69
Posts: 12
Feedback: 0 reviews

Thanks. That's a good point. It may be better to just use one of the kits or re-wire the relays under the hood. That way, the computer shouldn't think that it's in Lo.
JimmyW is offline  
post #5 of 11 Old 02-11-2015, 12:21 AM
Granite Guru
 
Mason's Avatar
 
Join Date: Nov 2014
Location: Warkworth, On
Age: 28
Posts: 360
Garage
Feedback: 0 reviews

Look into the Diablo and superchips jeep specific tuners. They can lock your axles in high range but you have to use the touch screen instead of your locker switch. Another positive is they have performance tunes in them as well. From what I have read you get more nori ingle increase in power with the high octane tunes. I don't have either yet, but I'm leaning towards the Diablo since you can load custom tunes onto it and you can't with the superchips.

2012 JKU Rubicon - Build Thread -
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Mason is offline  
post #6 of 11 Old 02-11-2015, 08:15 AM Thread Starter
Wheeler
 
Join Date: Feb 2015
Location: Helena. MT
Age: 69
Posts: 12
Feedback: 0 reviews

Thanks, Mason. I don't think Superchips has one for the 2015 HR with the locker feature. Another unit that should work is the Bully Dog 40417.
JimmyW is offline  
post #7 of 11 Old 02-11-2015, 08:57 AM
Rock God
 
ronjenx's Avatar
 
Join Date: Aug 2010
Location: Maine
Posts: 1,872
Feedback: 0 reviews

The switch in the t-case is a 5 position switch with a different resistance for each position.
The TIPM sends 5 volts to the switch. Depending on which t-case range is selected, a certain voltage leaves the switch and is routed back to the TIPM. The TIPM gives the voltage reading to the PCM.

Based on the above info, I don't think simply grounding the t-case switch will fool the PCM into thinking the t-case is in 4wd.

2008 Unlimited Rubicon Automatic
ronjenx is offline  
post #8 of 11 Old 02-11-2015, 09:30 AM
Rock God
 
Join Date: Aug 2014
Location: Denton, Tx
Age: 40
Posts: 528
Feedback: 0 reviews

Quote:
Originally Posted by JimmyW View Post
Thanks, Mason. I don't think Superchips has one for the 2015 HR with the locker feature. Another unit that should work is the Bully Dog 40417.
I put a 40417 bully dog in mine the other day and still NO lockers in 2wd or 4HI...not a big deal to me. I bought it for the speedo correction and a few other things it offered.

2014 JKUR, 3.5" X Factor RK lift, 40" Nitto Trail Grappler's, RIPP supercharger and UD60s.
stretch79 is offline  
post #9 of 11 Old 02-11-2015, 09:56 AM Thread Starter
Wheeler
 
Join Date: Feb 2015
Location: Helena. MT
Age: 69
Posts: 12
Feedback: 0 reviews

Thanks. Good thing to know. It's interesting that some guys swear by them and they don't work in other units. I hope that the factory resolves the issue for you. Support's important. I still, however, want to look at some of the easy wiring bypasses that others have used successfully. For me, I rather just have the locker bypass than any of the features offered by the tuners for $$$. Check this: http://www.offroadengineering.com/pr...-switches.html About $95.00

Last edited by JimmyW; 02-11-2015 at 02:23 PM.
JimmyW is offline  
post #10 of 11 Old 02-12-2015, 06:53 PM
Rock God
 
b1pig's Avatar
 
Join Date: Jan 2008
Location: ray city, ga
Posts: 1,234
Garage
Feedback: 1 reviews
Send a message via MSN to b1pig

Quote:
Originally Posted by stretch79 View Post
I put a 40417 bully dog in mine the other day and still NO lockers in 2wd or 4HI...not a big deal to me. I bought it for the speedo correction and a few other things it offered.
were you using the locker switches or using the programmer? on the diablosport, its in the programmer special functions.


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

'19 Ram 1500, '01 BMW R1100RT, '99 Fat Boy
needed: ̶b̶o̶a̶t̶ ̶a̶n̶d̶ plane
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
b1pig is offline  
post #11 of 11 Old 02-19-2015, 02:57 PM Thread Starter
Wheeler
 
Join Date: Feb 2015
Location: Helena. MT
Age: 69
Posts: 12
Feedback: 0 reviews

>Based on the above info, I don't think simply grounding the t-case switch will fool the
>PCM into thinking the t-case is in 4wd.

Aside from the t-case suggestion, there are a few pointers for the under-hood relays that folks have used with success, as in the link I cited in my first post. Maybe it's not do-able, but my preference still is to stick with the stock switch and use 4-hi & lo.
JimmyW is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JKowners.com : Jeep Wrangler JK 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
Display Modes
Linear Mode Linear Mode



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