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Old 05-07-2019, 08:02 AM   #1
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Best way to "drive" the 7-way umbilical

We have a dolly to move the AS around, so the front is not accessible by TV unless we manually turn it around (on purpose).

The down side is that I can't hook up to the umbilical to activate the backup camera.

I've done some quick googling and every "tester" is the opposite of what I'm trying to do, they test the TV connector.

Is there a tester that I can plug into the cord of the AS to drive the left/right/brake/running lights etc to make the lights work without the TV?

My main interest really is in turning on the backup cam, but being able to test the rest without the TV attached would be useful (to me at least).

Anyone of know of the best way to do this or a widget that can?
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Old 05-07-2019, 08:15 AM   #2
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You can use a jumper between 3 and 4 on the trailer 7-way umbilical (I use a 15 amp blade fuse.) This will turn on the running lights. People also use this hack to light up the trailer at a rally.

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Old 05-07-2019, 08:16 AM   #3
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If you have the batteries installed you should be able to just put a jumper between the battery (charge) connector and one of the other connection points to make them light up. If you're testing the backup camera and it's powered by the license plate or running lights, put a jumper between the 11 and 1 o'clock positions.
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Old 05-07-2019, 08:17 AM   #4
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If you have shore power where you're doing this (or if you just need this power intermittently) one of the gadgets for showing off your marker lights in the campground would do what I think you're looking to do.

They essentially just put a fused connection between the 12V pin and the running light pin on your connector. The simplest safe version of that is shown here, using an automotive fuse to make that connection.
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Old 05-07-2019, 08:29 AM   #5
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I take it the backup camera is hardwired and not a wireless device.
Assuming the signal for the backup camera is wired thru the center pin of the 7 way plug.
All that would be required is to place a jumper between the charge line pin and the center pin of the trailer 7 way plug. The house battery would provide the power needed to activate the camera.
You could get fancy and build your own testing device using some toggle switches mounted in an enclosure and wired to a 7 pin receptacle. This device would test all functions of the 7 pin connection.
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Old 05-07-2019, 08:38 AM   #6
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Wow, that was fast......LOL.

Never thought to do it this way, will rig up a fused pigtail with the spade lugs I have toolin' around.

Thanks for the tip!

Chris
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Old 05-07-2019, 09:51 AM   #7
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You can use a jumper between 3 and 4 on the trailer 7-way umbilical (I use a 15 amp blade fuse.) This will turn on the running lights.

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I concur
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Old 05-14-2019, 07:33 AM   #8
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saw the "Nappy Kamper" trailer light plug for sale. $10.00 Plug it in and you're lit up.
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