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  #1645  
Old 05-09-2016, 06:29 AM
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Re: The Towing thread

I have a tow pro unit fitted and the control knob is on the console just behind the gear lever.
Another bit of wiring to check is if you have a DC-DC in the van. Mine required a separate + fitted to the ignition the acts as a switch.

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  #1646  
Old 05-10-2016, 12:39 AM
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Re: The Towing thread

Quote:
Originally Posted by tasjeep View Post
I have a tow pro unit fitted and the control knob is on the console just behind the gear lever.
That's a handy idea. Which tow pro model do you have?

Quote:
Another bit of wiring to check is if you have a DC-DC in the van. Mine required a separate + fitted to the ignition the acts as a switch.
What do you mean by "DC-DC"? Is that the normal Anderson supply from car to van to run battery charger, fridge, etc.? If so, yes, that's been considered too.
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  #1647  
Old 05-10-2016, 12:48 AM
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Re: The Towing thread

Quote:
Originally Posted by mjt57 View Post

What do you mean by "DC-DC"? Is that the normal Anderson supply from car to van to run battery charger, fridge, etc.? If so, yes, that's been considered too.
A DC-DC convertor can bump up the output voltage if required to maintain the correct charge voltage to the secondary battery.
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  #1648  
Old 05-10-2016, 01:10 AM
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Re: The Towing thread

[QUOTE=mjt57;1289624]That's a handy idea. Which tow pro model do you have?



Its just the latest Redarc Towpro, comes with a remote control knob about 15mm diameter and that's all you see. the rest is fitted under the console .
If you are going to fit any other type of brake unit be careful of under dash fitting as they can get in the way of your knee as well as interfere with knee are bags if fitted.

Check to see if you have a DC-DC in the van and what wiring is required. Took me ages to work out why my batteries weren't charging as I was driving, the car hadn't been wired for that extra wire I mentioned.


Edit. Just did a google, its the tow-pro Elite
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  #1649  
Old 05-10-2016, 03:13 AM
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Re: The Towing thread

[QUOTE=tasjeep;1289628]
Quote:
Originally Posted by mjt57 View Post
Its just the latest Redarc Towpro, comes with a remote control knob about 15mm diameter and that's all you see. the rest is fitted under the console .
If you are going to fit any other type of brake unit be careful of under dash fitting as they can get in the way of your knee as well as interfere with knee are bags if fitted.
A mate had a Redarc fitted to his Jeep a couple of weeks ago. The control knob for it is below the dash line (about 4 o'clock as you look at the steering wheel). It seems to be OK there. But the console fitting sounds better.

Quote:
Check to see if you have a DC-DC in the van and what wiring is required. Took me ages to work out why my batteries weren't charging as I was driving, the car hadn't been wired for that extra wire I mentioned.
I don't think that it has. All I found were two batteries in the boot (well, the storage compartment at the front of the van), a battery protector device which I think is a circuit breaker or fuse holder and a Projecta battery charger. I'm going back there tomorrow to hook the van up to the Jeep to see how it sits and to organise a WDH for it. I'll ask all of these questions and more.

Unfortunately I don't understand your bit about the "extra wire for the ignition bit".

In the meantime I'll check out the Tow Pro Elite. And I'll ask the mate which model his is.
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  #1650  
Old 05-10-2016, 03:53 PM
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Smile Re: The Towing thread

[QUOTE=mjt57;1289640][QUOTE=tasjeep;1289628]







Unfortunately I don't understand your bit about the "extra wire for the ignition bit".


No need it worry about unless you have the DC-DC.
I have trouble understanding myself sometimes.
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  #1651  
Old 05-10-2016, 07:14 PM
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Re: The Towing thread

[QUOTE=mjt57;1289640]
Quote:
Originally Posted by tasjeep View Post

All I found were two batteries in the boot (well, the storage compartment at the front of the van), a battery protector device which I think is a circuit breaker or fuse holder and a Projecta battery charger..
Many van makes still install a one way diode in the battery circuits. It is designed to stop the flow of van battery power to the tow vehicle, but allow current to flow from the vehicle to the van only.
Unfortunately, these have a disadvantage where modern isolators depend on "seeing" the van battery. The diode prevents that. Just something to keep in mind.
I doubt if the van maker will install a DC/DC charger. They usually only install a AC/DC charger.
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  #1652  
Old 05-11-2016, 06:05 AM
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Re: The Towing thread

[QUOTE=allypally;1289808]
Quote:
Originally Posted by mjt57 View Post

one way diode
Is that like a left handed screwdriver? Sorry Alley, I'm just a testical old bugger
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  #1653  
Old 05-11-2016, 07:11 AM
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Re: The Towing thread

Quote:
Originally Posted by Mozzie View Post
A DC-DC convertor can bump up the output voltage if required to maintain the correct charge voltage to the secondary battery.
Yes it does that but it does at the expense of lower current availability and therefore less power overall. Best to put in decent battery wiring in the first place.
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  #1654  
Old 05-11-2016, 09:39 AM
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Re: The Towing thread

Quote:
Originally Posted by BobT View Post
Yes it does that but it does at the expense of lower current availability and therefore less power overall. Best to put in decent battery wiring in the first place.
I was answering a question regarding the purpose of a DC-DC convertor. Yes, the wiring does need to be upgraded to support the required current to charge the battery.

The benefit of the DC convertor is that you retain the correct voltage at the second battery. Some setups can have voltage drops across an isolator, fuses, switches and connectors. The DC convertor makes sure you have a fully charged secondary battery.
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  #1655  
Old 05-14-2016, 07:39 PM
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Re: The Towing thread

Quote:
Originally Posted by Mozzie View Post
The benefit of the DC convertor is that you retain the correct voltage at the second battery. Some setups can have voltage drops across an isolator, fuses, switches and connectors. The DC convertor makes sure you have a fully charged secondary battery.
Does the Jeep have one of these "smart alternators"? If so, it can't be that smart if it can't detect and charge a second battery properly without the use of one of these DC-DC units.

The van that we're getting has an anderson plug which connects directly to the battery. A Projecta battery charger connects directly to it as well. The Projecta gets its power from 240vAC.

Will the Jeep charge the battery properly in this config? Or, as others have suggested, do I need to install one of these DC-DC units?

I'm wondering how the previous owner managed without one.

If I should fit a DC-DC unit, I'd like to hear which ones that you who own caravans have.

Thanks

Martin
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  #1656  
Old 05-14-2016, 10:24 PM
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Re: The Towing thread

I could be wrong but my understanding is yes the Jeep has a smart alternator. You will get some charge into your batteries without a DC-DC both not fully charged.
I have a Projecta DC-DC fitted.
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