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Old 12-08-2018, 10:09 AM   #1
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7 way trailer pin to 7 and 4 way split
Looking to find if its made trying to split and use at same time 4 way and 7 way trailer hookup
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Old 12-08-2018, 06:33 PM   #2
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Most newer/late model PU's have both 7 pin and 4 pin connections located in the rear bumper.
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Old 12-08-2018, 08:40 PM   #3
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NAPA has adaptors.

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Old 12-08-2018, 09:04 PM   #4
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Another place to look is ETRAILER com....

My Truck has a dual 7-Blade and a standard 4-flat on the rear bumper area.

Haven't seen any thing that has a 7-way to both 7-pin and flat 4 way adapters...

My trailer connector box looks like this


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I have never tried it but I don't think I could use both the 7-way blade and 4-way flat connections at the same time... Would be unable to open both locking lid covers at same time...


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Old 12-09-2018, 07:06 AM   #5
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Take a look here as there are multiple options with plug and play and universal solutions
https://www.etrailer.com/dept-pg-Wir...m-Hopkins.aspx
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Old 12-09-2018, 07:32 AM   #6
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Quote:
Originally Posted by bradpark View Post
Looking to find if its made trying to split and use at same time 4 way and 7 way trailer hookup
What truck brand and model? What are you trying to do exactly? It sounds like you want to use the 7 pin for the trailer and the 4 pin to power something else, like a brake light bar?
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Old 12-09-2018, 06:57 PM   #7
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thank you all who offered assistance. My RV is a sprinter 3500 has one 7 pin on tow package . It does not have the 4. My intention is to tow electric braked tow dolly . I want to have lights work on towed vehicle as well as the dolly
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Old 12-09-2018, 06:59 PM   #8
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intention is to run magnet lights on towed vehicle. thought if there was aplug in splitter to run 7 pin as well as 4 it would be easier
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Old 12-09-2018, 08:11 PM   #9
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Originally Posted by bradpark View Post
intention is to run magnet lights on towed vehicle. thought if there was aplug in splitter to run 7 pin as well as 4 it would be easier
Hopkins and others make lots of varieties of adapters for this. Some plug into your 7 pin and split off, some replace your existing 7 pin with a 7/4 pin. If it were me, I would either go to a local dealer or call etrailer (possibly both really) and explain exactly what you want to do.

This would be one option, but you would want them to confirm if the harness would match your vehicle. https://www.etrailer.com/Custom-Fit-...M11141920.html
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