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Old 08-18-2023, 05:48 PM   #1
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Trailer: 1985 Scamp 16 ft / ft 04 Subaru Forester XS (extra slow)
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No 12v service after battery replacement

Our new/used 2021 Scamp 16 Deluxe is scheduled to go on its first trip nine days from now. I'm working through various systems and accessories and trying to understand them. Now I've hit a snag...

Today I replaced the battery with a Duracell AGM 12 volt unit. Those are sold precharged, and I measured it at 12.9 volts. Problem is, the voltmeter reads zero and won't even light up. I'm confident that I did the hookup correctly, following a photo I took of the original wiring. No 12 V lights are working. When I plug into shore power, everything works normally.

During the winter and spring, before the battery died, the 12v lights did work. I have checked the 12v fuses and they look ok.

The trailer has a red kill switch by the door, and that seems to have no effect in either setting.

I've sent an inquiry to Scamp, but they haven't responded. Does anyone here have any advice?
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Old 08-18-2023, 08:33 PM   #2
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Quote:
Originally Posted by John McMillin View Post
Our new/used 2021 Scamp 16 Deluxe is scheduled to go on its first trip nine days from now. I'm working through various systems and accessories and trying to understand them. Now I've hit a snag...

Today I replaced the battery with a Duracell AGM 12 volt unit. Those are sold precharged, and I measured it at 12.9 volts. Problem is, the voltmeter reads zero and won't even light up. I'm confident that I did the hookup correctly, following a photo I took of the original wiring. No 12 V lights are working. When I plug into shore power, everything works normally.

During the winter and spring, before the battery died, the 12v lights did work. I have checked the 12v fuses and they look ok.

The trailer has a red kill switch by the door, and that seems to have no effect in either setting.

I've sent an inquiry to Scamp, but they haven't responded. Does anyone here have any advice?
The most common issue which fits your description is having installed the battery backwards.
This is because the positive wire is often black while the negative is white or red, causing the confusion.
First be sure that the side with the fuse is attached to the POSITIVE+ side of the battery,
Also check the fuse to be sure it did not blow in the installation process,
Next check just inside the bulkhead where the wiring enters the trailer from the battery,,, There is another fuse in there as well which would isolate the battery..
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Old 08-18-2023, 08:46 PM   #3
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Trailer: 1985 Scamp 16 ft / ft 04 Subaru Forester XS (extra slow)
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Thanks, but...

I just confirmed that I have yellow and black connected to "+" and white to "-." That matches the old installation that worked. I took photos of both to make sure.

I didn't see a visible fuse on any of the wires, but I didn't trace them all the way back to the trailer. Which wire should have a fuse?
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Old 08-18-2023, 08:53 PM   #4
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Trailer: 1985 Scamp 16 ft / ft 04 Subaru Forester XS (extra slow)
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OK!

I found the fuse on the yellow wire and it was burnt out. I'll replace it tomorrow. Thanks for telling me about it. It was pretty apparent, but I wasn't looking for it.
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Old 08-20-2023, 09:51 AM   #5
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Glad you got it figured out. Might be a good idea to coat the new fuse contacts with dielectric grease to reduce corrosion if that fuse is out in the elements like ours was.
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