Need help - do i wire the vehicle harness with battery? - Fiberglass RV


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Old 10-12-2014, 11:41 PM   #1
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Name: Mike
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Need help - do i wire the vehicle harness with battery?

I have a Scamp 16 which I am amidst rewiring. Here is my thread - New Scampers with our '84 Scamp 16'

So - new wiring from front to back.. I am stuck on a few things.

1. The vehicle tow harness for the trailer tail lights has a Black (power) and White (ground). I recall seeing a wiring diagram that the black is wired into the trailer battery harness with a inline fuse?

Do I wire the black to the trailer battery black and the white to the trailer battery ground?

my plan was to wire the black all the way to the fuse box and to connect it with the battery wire using a inline fuse (30amp).

2. I don think my Scamp 16 has a wire for reverse lights. There are 4 wires each side, I don't see a 5th wire on either of the lights that could be for reverse....
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Old 10-13-2014, 12:07 AM   #2
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Mike, you may want to check in the document center here for some wiring write ups.
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Old 10-13-2014, 01:12 AM   #3
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I asked for a label maker for Fathers Day, and now use it to label each wire as positive or negative, and what is connected to it, IE: solar panel, refrigerator, car positive charge wire, etc.
These different colors applied to tow vehicles and trailers can be very confusingl
Dave & Paula
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Old 10-13-2014, 11:57 AM   #4
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Quote:
Originally Posted by mkippen View Post
2. I don think my Scamp 16 has a wire for reverse lights. There are 4 wires each side, I don't see a 5th wire on either of the lights that could be for reverse....
Unless I am mistaken, the round tail lights were not set up for reverse lights.
I am confused about the number of wires you mention. I've recently wired up round tail lights on my Compact Jr which only had 3 wires on each fixture:
  • White (Ground)
  • Black (Brake/Turn)
  • Green (Running Lights)

I added separate fixtures for reverse lights on my Compact Jr.
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Old 10-13-2014, 02:23 PM   #5
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Frederick is correct the old round Scamp lights never had back up lights.

Scamp by the way uses two inline fuses - one right off the battery (outside) and the other just inside the house where the wiring harness enters the trailer.

These diagrams are from the manual from my Scamp.
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electrical.jpg   Wire Diagram Scamp.jpg  

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Old 10-13-2014, 02:27 PM   #6
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Originally Posted by mkippen View Post

Do I wire the black to the trailer battery black and the white to the trailer battery ground?
On the Scamp the battery hook up is + Positive to Black and - Negative to White.
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Old 10-13-2014, 03:51 PM   #7
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Quote:
Originally Posted by mkippen View Post
I have a Scamp 16 which I am amidst rewiring. Here is my thread - New Scampers with our '84 Scamp 16'

So - new wiring from front to back.. I am stuck on a few things.

1. The vehicle tow harness for the trailer tail lights has a Black (power) and White (ground). I recall seeing a wiring diagram that the black is wired into the trailer battery harness with a inline fuse?

Do I wire the black to the trailer battery black and the white to the trailer battery ground?

my plan was to wire the black all the way to the fuse box and to connect it with the battery wire using a inline fuse (30amp).

2. I don think my Scamp 16 has a wire for reverse lights. There are 4 wires each side, I don't see a 5th wire on either of the lights that could be for reverse....
A link to something you might be interested in reading.


My point of view on electrical or propane is if you have ask questions like this you probably need to get somebody that knows what they're doing to at minimum guide you. Just because it's a trailer doesn't mean that electrical fires don't happen.
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Old 10-13-2014, 08:20 PM   #8
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Name: Mike
Trailer: Scamp
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Quote:
Originally Posted by David B. View Post
I asked for a label maker for Fathers Day, and now use it to label each wire as positive or negative, and what is connected to it, IE: solar panel, refrigerator, car positive charge wire, etc.
These different colors applied to tow vehicles and trailers can be very confusingl
Dave & Paula
I have done the same and labeled all the wiring behind the fuse panel so I know what goes to what. Considering I stuck with black and white wires for positive

Quote:
Originally Posted by Carol H View Post
Frederick is correct the old round Scamp lights never had back up lights.

Scamp by the way uses two inline fuses - one right off the battery (outside) and the other just inside the house where the wiring harness enters the trailer.

These diagrams are from the manual from my Scamp.
Thank you so much - I actually used this same wiring diagram I found on bing when searching for "Scamp wiring diagram" and I used it for some of the initial layout.

So yeah, I have a inline 30 amp fuse right off of the battery and I wired another one in line with the trailer harness when it connects up with the battery. Perfect!

I can confirm that it appears my scamp taillights do not have backup lights, so looks like the yellow trailer wire will be unused.

Quote:
Originally Posted by Carol H View Post
On the Scamp the battery hook up is + Positive to Black and - Negative to White.
Yup, figured this out early its wired like a house rather than a car. Black for Power and white for Neutral / ground. I have done a fair amount of wiring in cars so this was a bit confusing initially. Also the fact that the previous owner had wired up red for power and black for ground in some places didn't help.

Quote:
Originally Posted by Byron Kinnaman View Post
A link to something you might be interested in reading.


My point of view on electrical or propane is if you have ask questions like this you probably need to get somebody that knows what they're doing to at minimum guide you. Just because it's a trailer doesn't mean that electrical fires don't happen.
Main thing leading this question was the ability to drain the battery flat when your camping. I did some more investigation on this and found that the black (power) should be wired to a relay on the tow vehicle that is also connected to key on power. The goal being that you are not able to pull power from the tow vehicle unless the vehicle is on.

Thanks for sharing the concerns. I don't think it was a complete n00b question but then again... I am new to trailers and totally happy to get schooled on doing it right.
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Old 08-12-2015, 09:21 AM   #9
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Name: Mark
Trailer: Scamp
New Mexico
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Quote:
Originally Posted by Carol H View Post
Frederick is correct the old round Scamp lights never had back up lights.

Scamp by the way uses two inline fuses - one right off the battery (outside) and the other just inside the house where the wiring harness enters the trailer.

These diagrams are from the manual from my Scamp.
Carol H. Thanks for posting the wiring diagram. Trying to upgrade my old 7-pin connector to a 7 blade. Scamp apparently had their own ideas about how to place the wire colors in the 7-pin connector and I was struggling to figure out what went where. All better now. Appreciated.
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