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Towing with a Forester

97 messages,  Last post on Apr 21, 2008 at 6:24 AM

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What is this discussion about? Subaru Forester, Towing, Wagon


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#41 of 97
Do alternators charge trailer batteries? by kayakingsue
Oct 23, 2007 (9:17 am)
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Do you have to add an isolator, or does it come
with the trailer connection?
 
I thought the car's alternator automatically
recharged the deep-cell battery on the trailer
through the electrical connection that lit the
trailer's exterior lights and activated the
trailer's brakes.
#42 of 97
Re: Leaving tomorrow on the trip. [xtop] by ateixeira
Oct 24, 2007 (7:50 am)
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Replying to: xtop (Oct 23, 2007 6:50 am)

Have a good trip, Fred! He's probably off already.
#43 of 97
Towing trips; redesigning a small pop-up by kayakingsue
Oct 24, 2007 (7:58 am)
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Yes, Fred's off on his first TB trip and I'm back from my camp-hosting with my pop-up trailer, full of insights about trailing and pop-up living. I'm going to write Fleetwood a long letter about how they could re-design that rig to be more useful for a single person.
 
Does anyone know anything about retrofitting a pop-up for someone who isn't interested in sleeping the maximum number it (in theory) could hold?
#44 of 97
Re: Do alternators charge trailer batteries? [kayakingsue] by xtop
Oct 26, 2007 (6:34 pm)
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Replying to: kayakingsue (Oct 23, 2007 9:17 am)

Hi, we're back. The isolator is not strictly necessary. It simply protects your car battery from discharge through the trailer. If the wiring were in place, the car would charge the battery in the trailer. Most trailer harnesses that are built into the cars will only run the turn signals, tail lights, and brake lights through a 4-pin harness. The 7-pin adapter that I bought has three more wires and a ground if you want to send power to the trailer battery. One of the three wires is the 12-volt charging wire which someone has to add on to the system along with the aforementioned isolator. I can't remember what the other two wires are for.
 
The trailer towed beautifully. MPG ranged from 13-17. A high-pressure water line leaked but we found a replacement at the local Ace Hardware in Socorro, NM. The LP-gas alarm went off last night but we couldn't find any leaks. We had the heat on again today and no alarm. Hmmmmm.
#45 of 97
Re: Towing trips; redesigning a small pop-up [kayakingsue] by xtop
Oct 26, 2007 (6:37 pm)
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Replying to: kayakingsue (Oct 24, 2007 7:58 am)

Sounds like an owner refit to me. We found out a lot of things too. I will be making mods as we go along. Our max sleeping capacity and max number of sleepers is in agreement so we don't have that problem. How about a home theater in the other end of your rig? Just kidding. Good luck working it out.
 
Fred
#46 of 97
Re: Leaving tomorrow on the trip. [ateixeira] by xtop
Oct 26, 2007 (6:39 pm)
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Replying to: ateixeira (Oct 24, 2007 7:50 am)

Yup, we were off. Now we're back. One thing I failed to mention is that by putting everything we could in the rear of the trailer we changed the tongue weight from 225 lbs. to 205 lbs. Whoopee! Big deal, eh? I am going to have to adjust the headlights for towing for sure.
 
Fred
#47 of 97
Re: Do alternators charge trailer batteries? [xtop] by kayakingsue
Oct 26, 2007 (7:28 pm)
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Replying to: xtop (Oct 26, 2007 6:34 pm)

For what it's worth, a friend who had a trailer said that their alarm went off when the 12 volt battery was low.
 
The guy at the dealership who ran me through the trail set-up when I bought it told me that the car would not charge the 12 volt. Everything I've read and heard disagrees with that. I'll bring it up with them the next time I go there, along with the fact that they left the paper instructions for the heater INSIDE the heater behind a part you could only get to by removing a sheetmetal screw that was set so close to the top that no screwdriver could reach it!
 
No home theater--I use the extra bed to store things; the real problem is the mega-uncomfortable table seats and the stinking table, which sit out into the "aisle" too far.
 
I'm glad your maiden voyage was a success,
Sue
#48 of 97
Possible alarm causes. by xtop
Oct 26, 2007 (7:47 pm)
Reply
Well, the trailer was attached to "shore" power at the time the alarm sounded but it's possible the battery is defective. Anything is possible.
 
As to the car alternator charging the trailer battery, it will charge if I get a 12-volt power source to the correct terminal in the 7-pin connector. I will install everything in the spring before we pick up the trailer from storage. I have the correct isolator part number from the manufacturer and the recommended circuit breaker amperage along with the proper wire gauge number.
 
The charging question should perhaps be addressed to the manufacturer of your trailer. My trailer manual says it will charge and the mechanic who took us through our setup said it would charge on this trailer provided I do as I have stated. I have also ordered a compact solar panel charger that will fit nicely and puts out 6 watts max with a regulating circuit built in.
 
Are the table seats in the form of benches on your trailer? The table could probably be shortened by someone in a good custom carpentry shop.
 
Thank you, we are very happy about it also.
Fred
#49 of 97
Alarm by kayakingsue
Oct 26, 2007 (8:49 pm)
Reply
But "shore" power doesn't power everything. If the blower on the heater is powered by your trailer's battery, maybe the alarm will sound if you don't have enough 12 volt power? Or maybe it was the battery inside the alarm...but then why didn't you have a problem the next day?
 
Will you solar panel make the outlets run?
 
The table's seats are benches (that make the mattress on top of the table if you want to travel with midgets). Their foam is miserable; I will replace it and make new slip covers. (It would be nice it someone would design a small pop-up for use by one or two--with two comfy big seats instead of bench seats for four.)
 
The real issue is the table: its legs are off-set to accommodate the wheel-well, but not enough, so it doesn't go all the way to the wall and then the other legs (and about six inches of the table) are in the way. I tried to move the legs, but then they wouldn't fold up and I couldn't store it to fold the trailer down. I've got a couple of designed sketched out, but before I do anything I'm going to look at another Yuma to see if all the tables are that way. I swear the first one I looked at didn't have a table in the aisle.
#50 of 97
"Shore" power constantly charges the battery. by xtop
Oct 27, 2007 (7:47 am)
Reply
Our built in inverter charges our battery if we are hooked to an outside 110-volt power source. Therefore, in fact, the inverter is running the alarm system. That's not to say that there couldn't be some other glych in the system. I will have to take a look inside the LP-gas alarm and see what it has for independent power. I'm not sure it has a battery as when I pulled the fuse, it stopped sounding.
 
The solar panel will constantly charge the battery at only a small trickle rate. It will not power the trailer. It simply helps to keep the battery charged while the unit is parked in the sun. A solar panel that would run the outlets would have to be very large with present technology. There are larger panels available but I wouldn't want to mount them on our tiny rig and they get really expensive, really fast. Sort of like LCD TVs because of the fabrication costs for large panels.
 
We are looking at finding memory foam in bulk and replacing the foam on the upper part of our sleeping surface. Ours are also the bench cushions for the dining table. Our present foam is quite nice but it would be better if it were the memory type, we think.
 
Good luck on your design modifications. Yes, they do design most pop ups for the family with two children at the very least. It's much like being too tall or too short in stature. Everything is built for the median size person or family.
 
Fred

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