Help with wiring P4045 - Page 2 - Fiberglass RV


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Old 05-09-2014, 08:44 AM   #15
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Trailer: 1973 Hunter Compact II
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Quote: Last questions (for now).
1.) How do/where do I hook up Tow vehicle's wires coming in from the harness(Being a TC I only have 2) They both worked fine before my new project
A.) First charges the 12v system
B.) Second activates the running lights on the camper
2.) what are/where the blue fuse holders used for(fuse was labeled 1 (see pic below)
3.) is there a chart somewhere to show what size fuses should go to what?
A.) fuses for furnace, lights/fan, 12volt outlet,
B.) size breaker for outlet, future Air cod hookup, Main(30amp?)

Answers (WAG's Only)

1. A&B The charge line can connect directly to the battery or to the (+) terminal in the 4045, but be sure that it is fuse/circuit breaker protected close to the TV's battery
The running lights have no connection with the power chassis.

2. Are the "Blue Fuse Holders" in the 4045, otherwise I don't have a clue.

3. Might be, but the best way is to measure actual load and use an appropriate sized fuse. I use a lot of 5, 10 & 15 amp fuses. Lights: 10 amp, Furnace 10 amp, 12 vdc outlet 15 amps Water pump 10 amp.
AC outlets 15/20 amp
A/C 20 amp (Can't be bigger than the main.)

BTW: Do you have a good fire extinguisher? Is it nearby?
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Old 05-09-2014, 09:34 AM   #16
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Thanks bob, and yes I do have a smaller fire extinguisher. I do appreciate your help on all this. I use my tow vehicle's 7prong harness for my running lights and to charge the battery. They have two sets of fuses on the F150.

What are the 2 red wires for on the pd4045(the first two fuses ont the board? Is there anything specific I should use them for?

Yes the blue things are fuse holders 1amp. I think one went to the smoke detector and the CO alarms.
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Old 05-09-2014, 09:53 AM   #17
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I haven't seen the RED wires before. It looks like they are heavier, for bigger fuses and loads. I woul d suggest the Furnace and Refrigerator or 12VDC outlets. What does the current instruction sheet say about them?
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Old 05-09-2014, 10:48 AM   #18
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Ok, I got it all hooked up and and everything works.... Except it doesn't charge my battery or run the lights. There is a black wire from the converter side to the lower left side and is plugged into 120v hot. I am guessing I need to put that somewhere else, but where???

**The pic of someone elses setup shows it in a 15amp breaker. is that the right place?

I am going to owe Bob a few beers or coffee after this

EDIT> Shows that it is connected to a branch breaker. Do I need a dedicated breaker for it or can I pair it into another?
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Old 05-09-2014, 11:11 AM   #19
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Ok, I hooked it up to a branch breaker 15a all by itself(Had a choice between 15a and 20a). Everything works as it should and getting a 13.6ish charge on the battery reading while plugged into shore.

To sum it up. It was much harder than it needed to be. Should have been a 2 on a scale of 1 to 10, instead it was about a 6. The PD4045 has gotten rave reviews all over the net. The directions might as well not even exist. Not sure if they do this for liability purposes, to get you to go to an electrician or they just don't care It is like they were written in china, translated in India and printed in Michigan!!
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Old 05-09-2014, 01:18 PM   #20
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Not to be harsh, but installing a PD-4045 isn't like changing a light bulb. On a scale of 1 to 10 I would call it a 5 for someone with basic electrical skills.

And because different trailer builders wire somewhat differently and who knows what all of the previous owners of a 20 y.o. trailer might have done, it's impossible to make it a novice level installation.

It's not really designed to be installed by a non-electrician type if, for not other reason, to keep things from being burned up.
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Old 05-09-2014, 01:34 PM   #21
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Not harsh at all. Different people do have different skill levels. To be fair, I considerd a sparkplug change a 4 out of 10(on most vehicles) and don't even rate changing a bulb I have always been pretty good at this kind of stuff, as long as I have complete or detailed directions. After having to ask several questions that should have been covered in the instruction booklet, it makes it seem much more difficult. If I had to do it over again and do it correctly with what I know now, it would take me less than 30 minutes. The longest time spent cutting the hole a little larger to fit this and testing the lines to see what goes where. I may still seperate a few of the lights from the fantastic fan as I have plenty of fuses.

Thanks for the use of your wisdom/experience/Skills I really do appreciate it!!
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Old 05-09-2014, 02:01 PM   #22
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Quote:
Originally Posted by Bob Miller
Quote: Last questions (for now).
1.) How do/where do I hook up Tow vehicle's wires coming in from the harness(Being a TC I only have 2) They both worked fine before my new project

Answers (WAG's Only)
1. A&B The charge line can connect directly to the battery or to the (+) terminal in the 4045, but be sure that it is fuse/circuit breaker protected close to the TV's battery


Quote:
Originally Posted by MPohio View Post
I use my tow vehicle's 7prong harness for my running lights and to charge the battery. They have two sets of fuses on the F150.
I think you may have misinterpreted some of Bob's advise in regards to a fuse close to the battery. The fuses on the F150 are protecting the truck not the trailer. Most trailers have an inline fuse right at the battery to protect the trailer.
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Old 05-09-2014, 02:28 PM   #23
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Good point Carol. I did indeed misunderstand him. A lot of people don't run the 12v charger through their harness to the battery, they run a wire directly from the battery or alternator and need a fuse for that. I attached my TV wire directly to the pd4045 unit where my battery 12v attaches. Would I still need a fuse doing it that way, if so what amp fuse would you suggest.

Thanks, MP>
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Old 05-09-2014, 03:01 PM   #24
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Scamp actually has two inline fuses on their trailers and I believe that both are 30 amp. One is located right on the line coming off the battery before it connects into the main black power line coming from the seven pin tug connection. The other is located on the main black power line itself that runs to the converter but the fuse is on the line just as it enters the trailer before the line goes off to the converter or any other appliances lights etc...
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Old 05-09-2014, 03:07 PM   #25
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Thanks Carol. I will look into that. Mine was built in 1999 and the technology is probably even older than that Technology has definately improved in the last 15 years, so I am currently much better off than I was before, but there is always room for improvement

Mark>
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Old 05-09-2014, 04:20 PM   #26
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Originally Posted by MPohio View Post
Thanks Carol. I will look into that. Mine was built in 1999 and the technology is probably even older than that Technology has definately improved in the last 15 years, so I am currently much better off than I was before, but there is always room for improvement

Mark>
Hummm not sure technology as great deal to do with it. Simply extra safety measures to take to ensure you don't fry up your trailer, tug, converter or battery ..... stick around .... stuff happens that no one expected .... including an RV tech installing a battery backwards frying up a converter on a new trailer... yup stuff happens!
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Old 05-09-2014, 04:36 PM   #27
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That is why I asked sooooo many questions... to make sure I was doing it correctly. Especially when I am in uncharted territory. I have always been proactive when it comes to these things. If it looks like it might fail or have a problem, I replace it now.
I had two VW Rialtas before this camper. They were great, but I just got tired of dealing with one issue after another My f150 is pretty much servicealbe by me or anywhere in the US. I did all my work on my VWs, from complete tune-up, installed Tranny coolers, plugs &wires, to just about everything including new wiring. When I travel, I want zero gray areas, especially not knowing what the person who owned it before me did. Plus most manufacturers always cut corners to maximize profits.

I plan on taking this from Ohio to AZ then up to Oregon & WA. I just want to enjoy my adventure rather than dealing with crap that could have been avoided. Plus if something does happen on the road, I am familiar with it and can usually fix it in minute!!
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