five flat to four flat harness adapter

[slick2526]

i just bought a utility trailer with a four flat harness and I have a five flat on my truck. a blue wire comes off the five flat side and is suppose to tie into the reverse lights wire, which i dont think this trailer has in the first place.

From what I can tell you should only need to tie the blue wire in if the powered side is four flat going to the trailer being a five flat connection which in my case its opposite. I should just be able to snip off the blue wire and not even mess with it right?

[leech~~]

I think you can get a converter hook up to plug in between them and go!

[Whoaru99]

i just bought a utility trailer with a four flat harness and I have a five flat on my truck. a blue wire comes off the five flat side and is suppose to tie into the reverse lights wire, which i dont think this trailer has in the first place.

From what I can tell you should only need to tie the blue wire in if the powered side is four flat going to the trailer being a five flat connection which in my case its opposite. I should just be able to snip off the blue wire and not even mess with it right?

Well...my limited knowledge of the 5 wire vs 4 wire is that in 5 wire the brake lights are separate from the turn signals. So, I think you can't just snip off the extra wire or you won't have brake light indication.

[weld1]

correct just remove the blue wire. blue is for reverse lights on vehicle and activates a brake lock out solenoid on trailers that have surge brakes so you can back up without locking up brakes

[Hoffer]

Definitely just go with the converter...much easier. Then if you ever need to tow something else - you can just remove it.

[CaptainMusky]

Just plug in your 4 flat and go. The blue wire is to disable brakes when backing, If your trailer doesn't have them you don't have to worry. The 4 flat from the trailer should plug right into the 5 on the truck and be on your way. Don't cut anything or get an adapter.

[Jeremy airjer W]

Just plug in your 4 flat and go. The blue wire is to disable brakes when backing, If your trailer doesn't have them you don't have to worry. The 4 flat from the trailer should plug right into the 5 on the truck and be on your way. Don't cut anything or get an adapter.

Exactly!