The Towing thread - Page 140 - Jeep Garage - Jeep Forum

Go Back   Jeep Garage - Jeep Forum > Jeep Platform Discussion > Grand Cherokee - WK2 - > Export Grand Cherokee 2011+

Join Jeep Garage Today
Reply
 
Thread Tools Display Modes
 
  #1669  
Old 05-16-2016, 04:40 PM
Member
My Jeep: 2015 3.0L WK2
 
Join Date: Oct 2015
Location: Tasmania
Posts: 89
Thanks: 0
Thanked 16 Times in 15 Posts
Rep Power: 509
tasjeep is on a distinguished road
Re: The Towing thread

Close on the wiring. My DC-Dc is a Projecta, no sure of model number.
From battery to Anderson plug on rear of car, then to DC-DC in van, then to van battery.
PLUS a small wire from the DC-DC to trailer 12 pin, from there to a car positive connected to the ignition. This activates the DC-DC when car is running and turns off when car is stopped. Prevents draining the car battery when parked and still connected.


Trevor
ps as a brand Royal Flair have a good reputation.

Reply With Quote
The Following User Says Thank You to tasjeep For This Useful Post:
Sponsored Links
Advertisement
 
  #1670  
Old 05-16-2016, 06:19 PM
Premium Member
My Jeep: 2015 3.0L WK2
 
Join Date: Dec 2011
Location: Gold Coast Australia
Posts: 757
Thanks: 29
Thanked 123 Times in 107 Posts
Rep Power: 35781
John47 has a reputation beyond reputeJohn47 has a reputation beyond reputeJohn47 has a reputation beyond reputeJohn47 has a reputation beyond reputeJohn47 has a reputation beyond reputeJohn47 has a reputation beyond reputeJohn47 has a reputation beyond reputeJohn47 has a reputation beyond reputeJohn47 has a reputation beyond reputeJohn47 has a reputation beyond reputeJohn47 has a reputation beyond repute
Re: The Towing thread

Quote:
Originally Posted by mjt57 View Post
I believe you! And I'm looking at the IDC25 charger. Seems to be the best priced for what features that it has.

Still deciding whether to have one Anderson outlet and a red-to-grey anderson double adapter for the power and the ESC on the van, or to run two lots of cables from the battery. Perhaps run the ESC supply into the 12 pin plug (either P8 or P9) and rewire the ESC plug into a 12 pin one.
You might have picked up on this
how to wire red and grey anderson plugs - Caravaners Forum
more stuff to sort through - might help you make a decision.

You still might consider an isolator at the Jeep battery feeding a 6B&S cable to the back (you can buy this in twin easily), and once at the towwbar do all your splitting up. Will simplify the cable run and the body exit, plus a quality isolator will provide the protection needed, for not a lot of extra outlay. I use a Piranha DBE140 mounted down beside the Jeep battery https://www.autoelec.com.au/ssl/publ...?id=768&cat=47
John
__________________
2015 Laredo CRD
Billet Silver with Quadralift, front recovery hook, Mopar towbar
Upgraded from 2012 CRD that did the job brilliantly for 4 years
1975 Holden HJ 308 Monaro 4dr - oldie but a goodie
Reply With Quote
The Following User Says Thank You to John47 For This Useful Post:
  #1671  
Old 05-17-2016, 12:58 AM
BobT's Avatar
Premium Member
My Jeep: 2012 3.0L WK2
 
Join Date: Oct 2011
Location: Sydney, NSW, Australia
Posts: 2,234
Thanks: 1,112
Thanked 184 Times in 160 Posts
Rep Power: 74877
BobT has a reputation beyond reputeBobT has a reputation beyond reputeBobT has a reputation beyond reputeBobT has a reputation beyond reputeBobT has a reputation beyond reputeBobT has a reputation beyond reputeBobT has a reputation beyond reputeBobT has a reputation beyond reputeBobT has a reputation beyond reputeBobT has a reputation beyond reputeBobT has a reputation beyond repute
Garage
Re: The Towing thread

Quote:
Originally Posted by Futuresystem View Post
It would not matter what size cable and Anderson plugs that you have. Once that voltage drops, you are not going to charge the batteries in your van, period.
I have a Projecta electronic battery isolator. It works beautifully with the smart alternator. An hour or so on the road and my trailer lithiums are fully charged. However, I can see that there might be problems with standard isolators.

Quote:
There is a lot of discussion on this matter on various forums, and I've yet to see where anybody has found a way to stop the voltage dropping.

Feel free to correct me if you can find someone who has, I'm all ears.

Cya
I'm one! It's electrical engineering 101. Install a "Projecta 12V 150A Electronic Isolator Kit for use with Trailer Mounted Auxiliary Battery". Problem solved. No DC-DC converter or circuit breakers required. OK, you might not need 150A but remember you have an 120A alternator so why not?
__________________
Ordered 9 Nov 2011 - Delivered 3:30pm Friday 13 April 2012
Jeep Grand Cherokee Laredo 3L CRD, Black Forest Green Pearl, Quadra-lift, Off-road Adventure II, Front Recovery Hook, Mopar Tow Bar, Mopar Rock Rails, 150A Projecta Battery Isolator, Tekonsha P3 Brake Controller, Bridgestone D697 265/60R18 LT, Kimberley Kamper Special Edition
MudMap M7 off/on road sat nav, Chief Recovery Hooks "chrome", Chief 3mm Sump Protection Plate, Bluespark pro+boost tuning module set on C9, Chief Lower Front Guard
Reply With Quote
  #1672  
Old 05-21-2016, 05:27 AM
Member
 
Join Date: Nov 2014
Posts: 209
Thanks: 48
Thanked 37 Times in 30 Posts
Rep Power: 975
SnakeDoctor is on a distinguished road
Re: The Towing thread

Quote:
Originally Posted by BobT View Post
I have a Projecta electronic battery isolator. It works beautifully with the smart alternator. An hour or so on the road and my trailer lithiums are fully charged. However, I can see that there might be problems with standard isolators.

I'm one! It's electrical engineering 101. Install a "Projecta 12V 150A Electronic Isolator Kit for use with Trailer Mounted Auxiliary Battery". Problem solved. No DC-DC converter or circuit breakers required. OK, you might not need 150A but remember you have an 120A alternator so why not?
How does this isolator increase the voltage and maintain the correct charging profile for the aux battery?

How do you know the battery is full?

I guarantee you'd get more into it if you used a proper lithium battery charger.

I don't guarantee you'd notice or care though. (This point seems to cause the most headaches when this is debated).

If you are putting out 14.4 v into it, you will get close enough to 80% charge so in all practicality works fine.

EDIT: 220 amp alternator here.
__________________
MY2015 Jeep Grand Cherokee 3.0 CRD. Mopar underbody, Mopar Rock Rails, Chief front plate+hooks, CRDSTU Lift
Reply With Quote
  #1673  
Old 05-22-2016, 02:01 AM
BobT's Avatar
Premium Member
My Jeep: 2012 3.0L WK2
 
Join Date: Oct 2011
Location: Sydney, NSW, Australia
Posts: 2,234
Thanks: 1,112
Thanked 184 Times in 160 Posts
Rep Power: 74877
BobT has a reputation beyond reputeBobT has a reputation beyond reputeBobT has a reputation beyond reputeBobT has a reputation beyond reputeBobT has a reputation beyond reputeBobT has a reputation beyond reputeBobT has a reputation beyond reputeBobT has a reputation beyond reputeBobT has a reputation beyond reputeBobT has a reputation beyond reputeBobT has a reputation beyond repute
Garage
Re: The Towing thread

Quote:
Originally Posted by SnakeDoctor View Post
How does this isolator increase the voltage and maintain the correct charging profile for the aux battery?.
It doesn't increase the voltage but the cabling to the rear of the car is so heavy that the voltage drop is very much less particularly with high currents. The cabling supplied is 4B&S battery cable in both +ve and -ve earth return. It is a good idea to have a heavy earth return back to the battery to avoid having such large currents running through the body. It can cause catalytic corrosion. John47 mentioned the availability of twin 6B&S cabling. If you are not buying the Projecta trailer kit, this is a good idea because I can tell you, feeding two 4B&S cabled thought the body, is bloody hard.

The isolator doesn't need to provide a fancy charging profile. My trailer has a lithium battery management system so all the isolator needs to do is supply a decent voltage at whatever current the battery management system wants and it looks after the rest.

Quote:
How do you know the battery is full?
The battery management system has a readout in terms of percentage charge. I easily get 100% charge or at least that's what it tells me.

Quote:
EDIT: 220 amp alternator here.
Dead right, it's a 220A alternator. I figured I should put in a system that could take advantage of such a large alternator regardless of what I was towing.
__________________
Ordered 9 Nov 2011 - Delivered 3:30pm Friday 13 April 2012
Jeep Grand Cherokee Laredo 3L CRD, Black Forest Green Pearl, Quadra-lift, Off-road Adventure II, Front Recovery Hook, Mopar Tow Bar, Mopar Rock Rails, 150A Projecta Battery Isolator, Tekonsha P3 Brake Controller, Bridgestone D697 265/60R18 LT, Kimberley Kamper Special Edition
MudMap M7 off/on road sat nav, Chief Recovery Hooks "chrome", Chief 3mm Sump Protection Plate, Bluespark pro+boost tuning module set on C9, Chief Lower Front Guard
Reply With Quote
  #1674  
Old 05-22-2016, 04:03 AM
mjt57's Avatar
Member
My Jeep: 2015 3.0L WK2
 
Join Date: Oct 2015
Location: Gippsland, VIC, Australia
Posts: 174
Thanks: 13
Thanked 11 Times in 10 Posts
Rep Power: 612
mjt57 has much to be proud of
Re: The Towing thread

Quote:
Originally Posted by BobT View Post
Dead right, it's a 220A alternator. I figured I should put in a system that could take advantage of such a large alternator regardless of what I was towing.
Is that standard for the Grand Cherokee?

Last week an autolec wired up my GC for the new van (picked up on Friday - haven't been anywhere yet). I have a heavy fused cable from the battery to an Anderson plug. From there the cables go direct onto the battery in the van's front boot. When connected and I have a few things running such as lights, the water pump and a TV the van's battery volts sit at around 13.5v.

I haven't run the fridge yet and that's the big test. I need to finish off the trailer plug wiring with a wire to P2 to tell the fridge that the engine is running so it can turn on via DC.

If I see voltage drops I take it that I'll need some sort of battery charging device for it?
Reply With Quote
  #1675  
Old 05-22-2016, 06:56 PM
Premium Member
My Jeep: 2015 3.0L WK2
 
Join Date: Dec 2011
Location: Gold Coast Australia
Posts: 757
Thanks: 29
Thanked 123 Times in 107 Posts
Rep Power: 35781
John47 has a reputation beyond reputeJohn47 has a reputation beyond reputeJohn47 has a reputation beyond reputeJohn47 has a reputation beyond reputeJohn47 has a reputation beyond reputeJohn47 has a reputation beyond reputeJohn47 has a reputation beyond reputeJohn47 has a reputation beyond reputeJohn47 has a reputation beyond reputeJohn47 has a reputation beyond reputeJohn47 has a reputation beyond repute
Re: The Towing thread

Martin - the Au export Grand Cherokee with diesel engine gets the heavy duty 220amp alternator as standard across the models.
As Bob mentioned above, there are cables and then there are cables……his being 4B&S are like welding cables and hence minuscule voltage drop.
I've used 6B&S twin which on a relatively short run delivers close to full voltage.
If you didn't specify a cable size to your autoelec likely he used 6mm automotive - easy to fit and cheap. Chalk and cheese to the end result.
Your 3 way fridge is where the real load will come, and expecting the van battery to fully charge at the same time is high expectation.
That's where others have made a choice - BIG cables or a DC/DC charger.
Having a 220a alternator is no use at all if you can't get the voltage to the van battery through the wiring - further complicated by the smart alternator control (but we've already visited that)….

For further info on cable comparison https://www.redarc.com.au/images/upl..._worksheet.pdf

John
__________________
2015 Laredo CRD
Billet Silver with Quadralift, front recovery hook, Mopar towbar
Upgraded from 2012 CRD that did the job brilliantly for 4 years
1975 Holden HJ 308 Monaro 4dr - oldie but a goodie
Reply With Quote
  #1676  
Old 05-22-2016, 08:44 PM
mjt57's Avatar
Member
My Jeep: 2015 3.0L WK2
 
Join Date: Oct 2015
Location: Gippsland, VIC, Australia
Posts: 174
Thanks: 13
Thanked 11 Times in 10 Posts
Rep Power: 612
mjt57 has much to be proud of
Re: The Towing thread

Quote:
Originally Posted by John47 View Post
If you didn't specify a cable size to your autoelec likely he used 6mm automotive - easy to fit and cheap.
When you say "6mm" do you mean its diameter (of conductor or conductor and insulation)?

He ran three cables from the battery; ESC, Brakes and Anderson plug power for the van. The ESC and the brakes were a bit thinner than the Anderson plug one which is quite substantial. None are, though, what I'd call light cables.

With the van plugged into the car, 240v disconnected, at the battery there's 13.8v. I had all lights on, exhaust fans, water pump, TV, radio and 3 DVD players running. Current draw was 12.1a.

No fridge running as there is an issue with that at present. But that will tell the tale when it's up and running on DC. The former owner said that he had no issues with it.
Reply With Quote
  #1677  
Old 05-22-2016, 09:07 PM
Member
My Jeep: 2015 3.0L WK2
 
Join Date: Oct 2015
Location: Tasmania
Posts: 89
Thanks: 0
Thanked 16 Times in 15 Posts
Rep Power: 509
tasjeep is on a distinguished road
Re: The Towing thread

6mm is the square surface are of the cable. Hard to explain but if you cut the cable and look at the cut section that is 6mm square.
If the cable was a rectangle shape 3mm x 2mm would be 6mm square.
This cable will be fine for your ESC and even small will be ok for the brakes.. They should have run 6 B&S to the Anderson. By your description it does sound like what they have done.
Your fridge should be fine with that set up whilst travelling, but do not leave it connected with the engine turned off, even if its only while you have a coffee.

Trevor
Reply With Quote
  #1678  
Old 05-22-2016, 09:18 PM
BobT's Avatar
Premium Member
My Jeep: 2012 3.0L WK2
 
Join Date: Oct 2011
Location: Sydney, NSW, Australia
Posts: 2,234
Thanks: 1,112
Thanked 184 Times in 160 Posts
Rep Power: 74877
BobT has a reputation beyond reputeBobT has a reputation beyond reputeBobT has a reputation beyond reputeBobT has a reputation beyond reputeBobT has a reputation beyond reputeBobT has a reputation beyond reputeBobT has a reputation beyond reputeBobT has a reputation beyond reputeBobT has a reputation beyond reputeBobT has a reputation beyond reputeBobT has a reputation beyond repute
Garage
Re: The Towing thread

Quote:
Originally Posted by John47 View Post
If you didn't specify a cable size to your autoelec likely he used 6mm automotive - easy to fit and cheap. Chalk and cheese to the end result.
John is right. For some weird reason, Australia specifies its automotive small gauge wire (up to 6mm dia.) by the outside diameter of the insulation. Depending on where the wire is manufactured, the amount of copper in the wire can vary quite a bit. However, the B&S standard specifies precisely the cross-sectional area of copper in the cable. As an example, when I wired in the trailer plug harness to the Jeep's wiring, I used good old Aussie 3mm Narva automotive wire and thought it comical how puny the Jeep's wiring was but when I stripped the wire, I was surprised to see that the Jeep's wiring had nearly twice the copper as the Aussie wire (which was probably made in China but let's not go there).
__________________
Ordered 9 Nov 2011 - Delivered 3:30pm Friday 13 April 2012
Jeep Grand Cherokee Laredo 3L CRD, Black Forest Green Pearl, Quadra-lift, Off-road Adventure II, Front Recovery Hook, Mopar Tow Bar, Mopar Rock Rails, 150A Projecta Battery Isolator, Tekonsha P3 Brake Controller, Bridgestone D697 265/60R18 LT, Kimberley Kamper Special Edition
MudMap M7 off/on road sat nav, Chief Recovery Hooks "chrome", Chief 3mm Sump Protection Plate, Bluespark pro+boost tuning module set on C9, Chief Lower Front Guard
Reply With Quote
  #1679  
Old 05-22-2016, 09:29 PM
Premium Member
My Jeep: 2015 3.0L WK2
 
Join Date: Dec 2011
Location: Gold Coast Australia
Posts: 757
Thanks: 29
Thanked 123 Times in 107 Posts
Rep Power: 35781
John47 has a reputation beyond reputeJohn47 has a reputation beyond reputeJohn47 has a reputation beyond reputeJohn47 has a reputation beyond reputeJohn47 has a reputation beyond reputeJohn47 has a reputation beyond reputeJohn47 has a reputation beyond reputeJohn47 has a reputation beyond reputeJohn47 has a reputation beyond reputeJohn47 has a reputation beyond reputeJohn47 has a reputation beyond repute
Re: The Towing thread

From information readily available on the web - 6mm automotive cable is measured nominally by the OD - and in this case the cross sectional area equates to 4.59mm sq. mm is an industry term and doesn't relate to cross sectional area.
Taking this further - 6B&S provides nominally 13.56mm sq and 4 B&S provides nominally 20.26 mm sq.
So you can see there is a massive difference in conductor size.
As Trevor noted - if you have 6B&S to the Anderson it should be OK.
Worthwhile going back and reading Futuresystems posts as well…..
John
__________________
2015 Laredo CRD
Billet Silver with Quadralift, front recovery hook, Mopar towbar
Upgraded from 2012 CRD that did the job brilliantly for 4 years
1975 Holden HJ 308 Monaro 4dr - oldie but a goodie
Reply With Quote
  #1680  
Old 05-22-2016, 10:21 PM
Member
My Jeep: 2015 3.0L WK2
 
Join Date: Oct 2015
Location: Tasmania
Posts: 89
Thanks: 0
Thanked 16 Times in 15 Posts
Rep Power: 509
tasjeep is on a distinguished road
Re: The Towing thread

Martin, confused yet on cable size? I just looked it up, John and Bob are correct(I was wrong) Auto cable in Australia up to 6mm in size is measured by Dia, not mm sq.
When you get to the larger sizes like 6 B&S is when they measure by mm sq.
All very simple really.
Sorry if I confused.

Trevor
Reply With Quote
The Following User Says Thank You to tasjeep For This Useful Post:
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Towing thread steveo Grand Cherokee - WK2 - 290 12-05-2015 03:04 PM
Towing questions. First time towing looking for some input. JTS97Z28 Grand Cherokee - WK2 - 5 08-25-2012 04:53 PM
*****WK2*****2011-??? Grand Cherokee pricing and info thread discussion THREAD!!!! White WK Swagga Grand Cherokee - WK2 - 136 12-13-2010 12:52 AM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 05:13 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
Copyright 2012 - JeepGarage.Org
The Jeep Grand Cherokee Owners Community

JeepGarage.org is in no way associated with or endorsed by FCA US LLC. Chrysler, Dodge, Jeep, Ram, Mopar and SRT are registered trademarks of FCA US LLC.