whats the difference between the 4 way electric trailer harness and the 7 way?

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2008 Xterra 4x4

1986 CJ7
Lots of custom stuff...

Gone, But not Forgotten...
2003 Sport - 'Fire Engine' Red
Detours KJ Backbone
Skids
Boulder Bars
JBA 4.5 A Arms
245/75/16 Wrangler Duratracs's on Cragar Soft 8’s
Spidertrax 1.25" Spacers
Superwinch LP 8500
Frankenlifted

About 3. Couldn't resists.

The 4 ways are the wide flat one. I rented a u-haul dolly once and it had the 4 way adapter. It's the older style and the four loose wire just plug into the little grips on the 4 way plug.

My trailer is new and uses the 7 way which is the round plug with 7 prongs. New stuff = more electric stuff = 7 way.

4 work with wire and the 7 work with plugs. That's my take on it. My 7 way came with a 4 way adapter so I could connect with either. (so of course I forgot it when I rented the u-haul and had to buy another....)

I've rambled. Hope that helped.

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Nanette

03 Freedom with some neat stuff done to it that I learned about here.

4 wire is for the ground, turn signals and brake lights. 7 wire is for heavier trailers with electric brakes. if you are towing only a small utility trailer, don't worry about electric brakes on the trailer.

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'07 Ltd 3.7L, Black, OME HD's, OME shocks, Mopar Skids, AEV Bridgers w/ TPMS, Kumho KL78's, ARB Bumper, KC 130 Watters, Warn M8000 Winch, Rock Lizard Gecko Roof Basket KC 150 watters, Cobra 75WSX, 3 ft FireFly, RL Super Step Skinks

ahhhhhh

if need be are there adapters to go between the two?

_________________
2008 Xterra 4x4

1986 CJ7
Lots of custom stuff...

Gone, But not Forgotten...
2003 Sport - 'Fire Engine' Red
Detours KJ Backbone
Skids
Boulder Bars
JBA 4.5 A Arms
245/75/16 Wrangler Duratracs's on Cragar Soft 8’s
Spidertrax 1.25" Spacers
Superwinch LP 8500
Frankenlifted

Yes sort of. If you rent a triler with a 7 pin and u have a 4 pin, then any lowes, home depot autozone nappa... will have the converter.

there are also converters for the other direction.

Word of caution. IF the trailer has a 7 pin and you use the converter, make sure the electric brakes work and that you are not OVER pulling for your KJ.

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'07 Ltd 3.7L, Black, OME HD's, OME shocks, Mopar Skids, AEV Bridgers w/ TPMS, Kumho KL78's, ARB Bumper, KC 130 Watters, Warn M8000 Winch, Rock Lizard Gecko Roof Basket KC 150 watters, Cobra 75WSX, 3 ft FireFly, RL Super Step Skinks

Thanks for clarifying that.

How big/what kind of a trailer would have electric brakes?

_________________
2008 Xterra 4x4

1986 CJ7
Lots of custom stuff...

Gone, But not Forgotten...
2003 Sport - 'Fire Engine' Red
Detours KJ Backbone
Skids
Boulder Bars
JBA 4.5 A Arms
245/75/16 Wrangler Duratracs's on Cragar Soft 8’s
Spidertrax 1.25" Spacers
Superwinch LP 8500
Frankenlifted

KJ with just a hitch and no coolers can pull 2,000 lbs max.

KJ with coolers (Oil, Tranny, Power Streering) can pull 5,000 lbs max.

Something with alot of weight. Trailer brakes keep all that weight from coming around on you when you stop and not putting all that force on just the hitch and ball.

_________________
'07 Ltd 3.7L, Black, OME HD's, OME shocks, Mopar Skids, AEV Bridgers w/ TPMS, Kumho KL78's, ARB Bumper, KC 130 Watters, Warn M8000 Winch, Rock Lizard Gecko Roof Basket KC 150 watters, Cobra 75WSX, 3 ft FireFly, RL Super Step Skinks