GL Class (X164) 2007-2012: GL320CDI, GL420CDI, GL450, GL550

Tech question for those with brake controllers

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old Jun 18, 2008 | 10:57 PM
  #1  
Brocktoon's Avatar
Thread Starter
Super Member
 
Joined: Mar 2008
Posts: 903
Likes: 23
From: B.C.
GL 320cdi, Chevrolet Avalanchero, GLE 350 (on order)
Exclamation Tech question for those with brake controllers

Did you run a self-resetting circuit breaker between the 30 amp feed on the X58/28 connector and the controller as suggested by Tekonsha and MB?

Does the body of the circuit breaker have to be grounded (ie screwed into the body, or is plastic ok), or is it just an in-line affair?
Reply
Old Jun 18, 2008 | 11:44 PM
  #2  
Stumblefoot's Avatar
MBWorld Fanatic!
 
Joined: Apr 2007
Posts: 1,046
Likes: 1
From: Colorado Rocky Mtns.
'06 A6 & '08 GL550
Originally Posted by Brocktoon
Did you run a self-resetting circuit breaker between the 30 amp feed on the X58/28 connector and the controller as suggested by Tekonsha and MB?
The circuit breaker is actually removable just like a fuse. Use a 30 AMP breaker for 3-4 axle applications and a 20 AMP self resetting breaker for 1-2 axle applications. If going with the 20 AMP, get a 12 Volt, Type I (auto reset) 20 AMP breaker.

I wish I could take credit for the above explanation, but alas, it is from my education with the great Danno 4x4.

Originally Posted by Brocktoon
Does the body of the circuit breaker have to be grounded (ie screwed into the body, or is plastic ok), or is it just an in-line affair?
No idea, but I'm sure Danno will chime in to help.
Reply
Old Jun 18, 2008 | 11:49 PM
  #3  
Brocktoon's Avatar
Thread Starter
Super Member
 
Joined: Mar 2008
Posts: 903
Likes: 23
From: B.C.
GL 320cdi, Chevrolet Avalanchero, GLE 350 (on order)
Like a fuse? The ones I have on my land Rover are little boxes screwed to the firewall. Are you saying you can put something in place of the original 30a fuse? That would be cool.
Reply
Old Jun 19, 2008 | 02:55 PM
  #4  
Danno4x4's Avatar
Senior Member
 
Joined: Dec 2006
Posts: 405
Likes: 1
From: Scottsdale, AZ
2007 GL320 CDI, 2001 TJ Rockcrawler, 2005 Scoobie STI
I created a wiring harness to go between the vehicle connector and the Brake Controller Connector and I did use a self-resetting circuit breaker on the Power wire as the instructions indicated...

Most AutoParts stores have a pretty good selection of circuit breakers in different configurations and what I decided to use was an ATC type footprint Type I self resetting circuit breaker, since it fits nicely in an ATC fuse holder.

Check out this web page and you can see exactly what I used :

http://www.cooperet.com/6/BladeFusesandAccessories.html

Basically what I did was I used a HHG ATC Holder inline with the Power Wire and removed the rubber cap (since it is too big to fit over the breaker)



and then I simply bought a ACB-20 ATC Style Breaker and plugged it right in to the Fuse Holder...



Nice Clean and Easy... Use a 30 AMP breaker for 3-4 axle applications and a 20 AMP self resetting breaker for 1-2 axle applications.

I would leave the original 30 AMP fuse alone and just wire in the supplemental circuit breaker.
Attached Thumbnails Tech question for those with brake controllers-fuse-holder.jpg   Tech question for those with brake controllers-circuit-breaker.jpg  
Reply
Old Jun 19, 2008 | 02:59 PM
  #5  
Brocktoon's Avatar
Thread Starter
Super Member
 
Joined: Mar 2008
Posts: 903
Likes: 23
From: B.C.
GL 320cdi, Chevrolet Avalanchero, GLE 350 (on order)
Thanks, oddly enough I just came back from the store with those two exact same items. But the fuse holder looks a bit cheap, once I got it home. Why not just put the fuse across two insulated female blade crimps? Looks like I could make it more solid that way, and stay with only one wire guage.
Reply

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 


You have already rated this thread Rating: Thread Rating: 0 votes,  average.


All times are GMT -4. The time now is 10:53 PM.

story-0
New Electric Mercedes-AMG GT 4-Door Coupe Unveiled: 10 Things You Need to Know

Slideshow: Mercedes-AMG's new electric GT 4-Door Coupe trades combustion for software, synthetic noise, and more than 1,100 horsepower.

By Verdad Gallardo | 2026-05-20 20:08:15


VIEW MORE
story-1
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)

Slideshow: Not every Mercedes design becomes timeless, some feel stuck in the era they came from.

By Verdad Gallardo | 2026-05-12 18:09:07


VIEW MORE
story-2
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun

Slideshow: Yes, Mercedes built manual cars, and some of them are far more interesting than you'd expect.

By Verdad Gallardo | 2026-05-02 12:36:58


VIEW MORE
story-3
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren

Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.

By Verdad Gallardo | 2026-04-29 11:19:28


VIEW MORE
story-4
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine

Slideshow: Before curves took over, Mercedes mastered the art of the straight line, and some of those shapes still look right today.

By Verdad Gallardo | 2026-04-25 12:05:49


VIEW MORE
story-5
Flawlessly Restored Mercedes 190E Evo II Heads to Auction

Slideshow: The 190E Evolution II shows how a homologation necessity became a six-figure collector icon.

By Verdad Gallardo | 2026-04-22 17:53:47


VIEW MORE
story-6
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know

Slideshow: Mercedes is turning one of its core nameplates electric, and the details show just how serious this shift is.

By Verdad Gallardo | 2026-04-21 13:58:06


VIEW MORE
story-7
Mercedes EQS Gets A Major Update: Everything You Need to Know

Slideshow: Faster charging, longer range, and a controversial steer-by-wire system define the latest evolution of Mercedes-Benz EQS.

By Verdad Gallardo | 2026-04-15 10:35:34


VIEW MORE
story-8
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve

Slideshow: These overlooked Mercedes-Benz models never got the spotlight, but they quietly delivered more than most remember.

By Verdad Gallardo | 2026-04-13 19:35:45


VIEW MORE
story-9
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping

Slideshow: A well-used 1991 Mercedes-Benz 300D with more than one million miles is now looking for a new owner, and it still appears ready for more.

By Verdad Gallardo | 2026-04-10 10:05:15


VIEW MORE