hydraulic brakes on trailer qeustion

peba · 10-30-2009, 05:24 PM

will a trailer with hydraulic brakes have a different adapter or the same seven prong adapter?

BernieB · 10-30-2009, 05:28 PM

It'll be standard seven pin I believe.

leolkfrm · 10-30-2009, 05:46 PM

most use a seven pin round, but the trailer does not have anything hooked to the brake terminal

chevyguy · 11-09-2009, 11:13 AM

Most hydraulis systems work of surge, No extra wires, If the trailer pushes forward on the coupler it applies the brakes itself.

BernieB · 11-09-2009, 01:57 PM

Quote:

Originally Posted by chevyguy

Most hydraulis systems work of surge, No extra wires, If the trailer pushes forward on the coupler it applies the brakes itself.

Right, but trailers that size usually use the 7 pin because it's the default standard for larger trailers.

436'd skylark · 11-09-2009, 04:00 PM

there is no need for a 7 pin without the trailer brakes, so a 4 pin wouldn't be out of the question.

leolkfrm · 11-09-2009, 04:48 PM

my truck is wired with a seven, the boat trailer i have is hydraulic brakes, and wired with a 4 flat.....I use an adapter!

BernieB · 11-09-2009, 04:53 PM

Quote:

Originally Posted by 436'd skylark

there is no need for a 7 pin without the trailer brakes, so a 4 pin wouldn't be out of the question.

No, a four isn't out of the question, but often times trailers large enough to require brakes also have reverse lights or batteries that need charging, and that's done with a seven pin.

chevyguy · 11-09-2009, 05:37 PM

Agreed with all, As long as he has a 7 to 4 adapter he will be good to go either way.

mrjohnwayne · 11-09-2009, 08:06 PM

also depends on the trailer size. Some of the larger 40' gooseneck, or heavy rated shorter trailers will use electric over hydraulic for the brakes instead of just electric or surge (which only works on bumper pull)

trailer size really doesn't matter on smaller trailers. some could have a 7 pin plug for just brake and turn lights etc.. just depends on how it was wired from the factory or the previous owner...

10-30-2009, 05:24 PM	#1
peba Full Member Join Date: Oct 2007 Location: southern maryland Posts: 14	hydraulic brakes on trailer qeustion will a trailer with hydraulic brakes have a different adapter or the same seven prong adapter? __________________ 2004 silverado z71 exhaust, cold air intake, 32 mud tires , 8mm spark plug wires

10-30-2009, 05:28 PM	#2
BernieB Senior Member Join Date: Jul 2009 Location: Fredericksburg, VA Posts: 1,906	It'll be standard seven pin I believe. __________________ If the guys who design 'em had to take one home, use it every day for 2 years, and do all the maint and repairs themselves, cars would have a button on the dash to change the oil, filters & plugs.

10-30-2009, 05:46 PM	#3
leolkfrm Senior Member Join Date: Mar 2008 Location: N.Y. Posts: 4,300	most use a seven pin round, but the trailer does not have anything hooked to the brake terminal __________________ 4 wheels move the body 2 wheels move the soul B.W.A.I

11-09-2009, 11:13 AM	#4
chevyguy Senior Member Join Date: Sep 2005 Location: ALABAMA Posts: 3,370	Most hydraulis systems work of surge, No extra wires, If the trailer pushes forward on the coupler it applies the brakes itself. __________________ Friends dont let friends use body lifts USMC 92-96 USCG 98 to present

11-09-2009, 04:00 PM	#6
436'd skylark Senior Member Join Date: Mar 2007 Location: Buffalo Ny Posts: 661	there is no need for a 7 pin without the trailer brakes, so a 4 pin wouldn't be out of the question. __________________ Joe 89 K2500 Chevy, Wee-Oh-five 285K miles, completly rebuilt needs a motor, bad 1962 IHC Scout All Wheel Drive (Scout speak for locking axles) 152 ci, dana everything else

11-09-2009, 04:48 PM	#7
leolkfrm Senior Member Join Date: Mar 2008 Location: N.Y. Posts: 4,300	my truck is wired with a seven, the boat trailer i have is hydraulic brakes, and wired with a 4 flat.....I use an adapter! __________________ 4 wheels move the body 2 wheels move the soul B.W.A.I

11-09-2009, 05:37 PM	#9
chevyguy Senior Member Join Date: Sep 2005 Location: ALABAMA Posts: 3,370	Agreed with all, As long as he has a 7 to 4 adapter he will be good to go either way. __________________ Friends dont let friends use body lifts USMC 92-96 USCG 98 to present

11-09-2009, 08:06 PM	#10
mrjohnwayne Senior Moderator Join Date: Apr 2005 Location: Texas Posts: 3,722	also depends on the trailer size. Some of the larger 40' gooseneck, or heavy rated shorter trailers will use electric over hydraulic for the brakes instead of just electric or surge (which only works on bumper pull) trailer size really doesn't matter on smaller trailers. some could have a 7 pin plug for just brake and turn lights etc.. just depends on how it was wired from the factory or the previous owner... __________________ John Wayne 2000 F-350 7.3L Powerstroke 4x4

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