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Old 09-27-2013, 02:04 PM   #1
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Seven Pin Connector

How many of you guys have added a 7 pin connector? I have an 04' Dolphin on a Workhorse w-22 Chassis. Which connector did you use? Did you install it yourself? Is there one that is just plug and play into the stock wiring harness? I noticed thier was a female connector that looked like i could plug into it... any advice out there?

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Old 09-27-2013, 02:23 PM   #2
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What brand connector is on your coach now? Are you needing to match a tow plug to your connector?

My connector is a Chrysler make or pin pattern. If you know your pin arrangement, left, right, stop, battery... all you need do is buy a plug that fits you outlet and wire your cord to match it. There is a rack full of connectors and adapters to be had at most auto parts stores, Tractor Supply or anywhere trailer tow supplies can be had.

Rick & Melissa Young & Dawson, 2011 Itasca Meridian 40U, Freightliner XCL, Cummins ISL 380HP/DEF, Allison 3000 MH, 2014 Honda CR-V, SMI AF1, Blue Ox tow equip., TST 507 TPMS, TruCenter steering control, Hughes auto transformer.
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Old 09-27-2013, 04:21 PM   #3
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Location: Austin, Texas
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My Phaeton came with the 7 pin, so I had to change up the connector and the wiring on my toad to match......it was nice having the "hot" wire which I used with my Toad Charge (LSL).

2013 Phaeton 40QBH
Freightliner Chassis/Cummins ISC 380HP
2010 Honda CRV Toad
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Old 09-28-2013, 04:27 PM   #4
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Location: Powell River, B.C.
Posts: 11,950
The 7 pin connector is a universal design , and any manufacturer's male or female end will fit others.
For wiring info visit
Trailer Wiring Diagrams | etrailer.com

To see if there is a plug and play unit available visit Napa or AutoZone.
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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Old 09-28-2013, 04:45 PM   #5
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U-Haul or Amazon sells adapters in any combination needed fairly cheaply. We had to buy a 6 pin to 4 pin one when we rented a tow dolly from them in May & saw the other styles on the U-Haul wall.
Joe & Kathy
2000 Winnebago Adventurer 32V Workhorse Chassis
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Old 09-28-2013, 05:37 PM   #6
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Posts: 21,174
The workhorse chassis units I've seen came from the factory with a Flat-4,, The Flat-4 has connections for GROUND (The odd pin) Tail lights (next to it) left and right turn/stop (Not sure which order without going to the head.. Yes, there's a chart there (Well a tester is stored there).

The 7 pin adds battery, brakes and "Aux" often back up lights.

What I would do.

I'd start with a flat 4, trailer end and wire it to the 7-pin (All but the ground lead) I'd add a heavy duty (10ga at least) ground, then how I hooked up the rest of the wired would depend on what else I'm replacing, but as much as possible I'd just plug into the existing jack with the "Trailer plug" (The plug that used to plug into it from the trailer or towed)

That way you have not, in any way, changed the wiring on the motor home... And you can "Restore" to original by simply pulling a plug or two.

Home is where I park it!
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