trailer brake control - The 1947 - Present Chevrolet & GMC Truck Message Board Network

mblackburnjr · 11-29-2009, 08:07 AM

I am hooking up on 2001 Silverado. Cant find where to hook brake wire into electric panel under hood. anyone?

Gray Ghost · 11-29-2009, 11:35 AM

There should be a separate harness for the controller. I have one that sits in my workshop waiting for the day I get trailer brakes on my trailer. Not sure where it plugs in though.

mblackburnjr · 11-29-2009, 12:52 PM

truck is factory wired to electrical panel under hood. I cant find where to plug in the blue brake wire. truck is 1500 series extended cab.

Gray Ghost · 11-29-2009, 02:51 PM

Sounds like your truck is different from mine...hope you find out.

mblackburnjr · 11-30-2009, 03:03 PM

Came from factory with tow package. Someone has removed trailer brake control.

Gray Ghost · 11-30-2009, 08:32 PM

OK....There is an available harness that does it all for you. It plugs into the main harness under the dash somewhere and the other end goes to your brake controller. You shouldn't have to wire anything yourself. I will go out and get the PN off the harness for you....but just for grins I gotta ask, have you looked up under the dash yet to see if the harness is there?

SkylineNXS · 12-01-2009, 01:54 AM

I have a 00 sierra extended, so it may be different, but right behind the parking brake pedal there is a "black box" cover, if u remove that, i do believe that is where u are supposed to plug in, at least my aftermarket controller wires to this location...

Brad

mblackburnjr · 12-01-2009, 07:39 AM

The wire is under hood at electrical center.

JohnC · 12-01-2009, 04:11 PM

Quote:

Originally Posted by SkylineNXS

I have a 00 sierra extended, so it may be different, but right behind the parking brake pedal there is a "black box" cover, if u remove that, i do believe that is where u are supposed to plug in, at least my aftermarket controller wires to this location...

Brad

My 03 GMC, and 02 Chevy have the plugs both in this same spot.

SkylineNXS · 12-02-2009, 02:31 AM

I hope this helps out, it is for my 00 sierra, but hopefully urs should be similar...

send me a pm if u need a higher res pic, i have good eyes and can read this, haha....

Brad

mblackburnjr · 12-02-2009, 02:47 PM

The wire is under the hood at electrical center. If you have a pic of that would help.

1978steven · 12-02-2009, 08:35 PM

Quote:

Originally Posted by Gray Ghost

There should be a separate harness for the controller. I have one that sits in my workshop waiting for the day I get trailer brakes on my trailer. Not sure where it plugs in though.

+1

Quote:

Originally Posted by SkylineNXS

I have a 00 sierra extended, so it may be different, but right behind the parking brake pedal there is a "black box" cover, if u remove that, i do believe that is where u are supposed to plug in, at least my aftermarket controller wires to this location...

Brad

+1

NBS GM's from 1999-2007 Classic with the tow package came with the harness to wire up an aftermarket brake controller. Splice the wires from your controller to the GM harness and plug into the black box behind your emergency brake pedal. Then put the fuse that was wrapped up with the harness in the under hood fuse box, and your done.

Sounds like you need the GM harness, it makes it very easy....

mblackburnjr · 12-03-2009, 08:26 AM

Blue wire is already at elect. center under hood. I just need to find where to plug it in.

Shon · 12-03-2009, 02:15 PM

is the blue wire for ground or constant 12v?

mblackburnjr · 12-03-2009, 03:25 PM

It runs back to trailer plug. It actually is what applies the trailer brakes.

Shon · 12-03-2009, 03:29 PM

Does this help??

http://www.etrailer.com/faq-wiring.aspx

The blue wire runs from the controller back to plug where the trailer plug hooks to and then it sends the signal (ground I think) to the trailer brakes.

Shon · 12-03-2009, 03:31 PM

Also here
http://www.chuckschevytruckpages.com/trailerlights.html

blue is ground.

1978steven · 12-03-2009, 06:34 PM

This blue wire from the rear connector to the engine compartment?

mblackburnjr · 12-04-2009, 03:43 PM

Blue wire comes from light plug at rear of truck.Goes to electrical center under hood. Wiring from controller plugs in at park brake. Runs out to electrical center under hood. What i am asking is where do the blue wires connect? The blue wire has a plug but I cant see where it plugs into the elec center. This is the one coming from rear.

11-29-2009, 08:07 AM	#1
mblackburnjr collector of vintage rust Join Date: Apr 2004 Location: southern ohio Posts: 421	trailer brake control I am hooking up on 2001 Silverado. Cant find where to hook brake wire into electric panel under hood. anyone?

11-29-2009, 11:35 AM	#2
Gray Ghost Senior Member Join Date: Sep 2004 Location: Terrell, TX Posts: 1,967	Re: trailer btake control There should be a separate harness for the controller. I have one that sits in my workshop waiting for the day I get trailer brakes on my trailer. Not sure where it plugs in though. __________________ Kelly '05 GMC Sierra SLE Z71 Bone stock except for new bed rail caps.

11-29-2009, 12:52 PM	#3
mblackburnjr collector of vintage rust Join Date: Apr 2004 Location: southern ohio Posts: 421	Re: trailer btake control truck is factory wired to electrical panel under hood. I cant find where to plug in the blue brake wire. truck is 1500 series extended cab.

11-29-2009, 02:51 PM	#4
Gray Ghost Senior Member Join Date: Sep 2004 Location: Terrell, TX Posts: 1,967	Re: trailer btake control Sounds like your truck is different from mine...hope you find out. __________________ Kelly '05 GMC Sierra SLE Z71 Bone stock except for new bed rail caps.

11-30-2009, 03:03 PM	#5
mblackburnjr collector of vintage rust Join Date: Apr 2004 Location: southern ohio Posts: 421	Re: trailer btake control Came from factory with tow package. Someone has removed trailer brake control.

11-30-2009, 08:32 PM	#6
Gray Ghost Senior Member Join Date: Sep 2004 Location: Terrell, TX Posts: 1,967	Re: trailer btake control OK....There is an available harness that does it all for you. It plugs into the main harness under the dash somewhere and the other end goes to your brake controller. You shouldn't have to wire anything yourself. I will go out and get the PN off the harness for you....but just for grins I gotta ask, have you looked up under the dash yet to see if the harness is there? __________________ Kelly '05 GMC Sierra SLE Z71 Bone stock except for new bed rail caps.

12-01-2009, 01:54 AM	#7
SkylineNXS Registered User Join Date: Oct 2006 Location: Elgin, IL Posts: 658	Re: trailer btake control I have a 00 sierra extended, so it may be different, but right behind the parking brake pedal there is a "black box" cover, if u remove that, i do believe that is where u are supposed to plug in, at least my aftermarket controller wires to this location... Brad __________________ 2000 GMC Sierra EXT Cab Short 4x4, finally mine... 1966 C10 SWB Fleet, 250 I6, three on the tree.... Previously Owned.... 1987 Chevy R10 "Silverado" (at least the badges were) Short Step 350 700r4.... 1972 Chevy LWB Fleet 350/350 EXTENDED CAB ALL THE WAY! .._..~...-...._...____ .._..-...______\|_\|__\____ ..-..~.\|_(O)__\|_\|__\|_(O)]

12-01-2009, 07:39 AM	#8
mblackburnjr collector of vintage rust Join Date: Apr 2004 Location: southern ohio Posts: 421	Re: trailer btake control The wire is under hood at electrical center.

12-02-2009, 02:31 AM	#10
SkylineNXS Registered User Join Date: Oct 2006 Location: Elgin, IL Posts: 658	Re: trailer btake control I hope this helps out, it is for my 00 sierra, but hopefully urs should be similar... send me a pm if u need a higher res pic, i have good eyes and can read this, haha.... Brad Attached Images __________________ 2000 GMC Sierra EXT Cab Short 4x4, finally mine... 1966 C10 SWB Fleet, 250 I6, three on the tree.... Previously Owned.... 1987 Chevy R10 "Silverado" (at least the badges were) Short Step 350 700r4.... 1972 Chevy LWB Fleet 350/350 EXTENDED CAB ALL THE WAY! .._..~...-...._...____ .._..-...______\|_\|__\____ ..-..~.\|_(O)__\|_\|__\|_(O)]

12-02-2009, 02:47 PM	#11
mblackburnjr collector of vintage rust Join Date: Apr 2004 Location: southern ohio Posts: 421	Re: trailer brake control The wire is under the hood at electrical center. If you have a pic of that would help.

12-03-2009, 08:26 AM	#13
mblackburnjr collector of vintage rust Join Date: Apr 2004 Location: southern ohio Posts: 421	Re: trailer brake control Blue wire is already at elect. center under hood. I just need to find where to plug it in.

12-03-2009, 02:15 PM	#14
Shon Registered User Join Date: Sep 2005 Location: sc Posts: 1,203	Re: trailer brake control is the blue wire for ground or constant 12v? __________________ 71 Cheyenne C10 LWB cam'd 6.0/T56 Swap

12-03-2009, 03:25 PM	#15
mblackburnjr collector of vintage rust Join Date: Apr 2004 Location: southern ohio Posts: 421	Re: trailer brake control It runs back to trailer plug. It actually is what applies the trailer brakes.

12-03-2009, 03:29 PM	#16
Shon Registered User Join Date: Sep 2005 Location: sc Posts: 1,203	Re: trailer brake control Does this help?? http://www.etrailer.com/faq-wiring.aspx The blue wire runs from the controller back to plug where the trailer plug hooks to and then it sends the signal (ground I think) to the trailer brakes. __________________ 71 Cheyenne C10 LWB cam'd 6.0/T56 Swap Last edited by Shon; 12-03-2009 at 03:31 PM.

12-03-2009, 03:31 PM	#17
Shon Registered User Join Date: Sep 2005 Location: sc Posts: 1,203	Re: trailer brake control Also here http://www.chuckschevytruckpages.com/trailerlights.html blue is ground. __________________ 71 Cheyenne C10 LWB cam'd 6.0/T56 Swap



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12-03-2009, 06:34 PM	#18
1978steven Registered User Join Date: Oct 2004 Location: Currently New Windsor, NY but Texas is home Posts: 332	Re: trailer brake control This blue wire from the rear connector to the engine compartment? Attached Images __________________ 2002 Silverado 2500HD LB7 CCSB LT EFI Live by Rob at ATP, Edge CTS Insight DSP 5 control, S&B CAI, PPE boost valve, Pro Fab AIH, AirDog II 165, PPE WIF sensor delete plug, 5" stainless exhaust, Cognito braces & HD tie rods, H2's 315/70 R17 BFG's 2004 Tahoe LT 2006 Silverado Z71 LS 1971 Chevy C10 Last edited by 1978steven; 12-03-2009 at 06:38 PM.

12-04-2009, 03:43 PM	#19
mblackburnjr collector of vintage rust Join Date: Apr 2004 Location: southern ohio Posts: 421	Re: trailer brake control Blue wire comes from light plug at rear of truck.Goes to electrical center under hood. Wiring from controller plugs in at park brake. Runs out to electrical center under hood. What i am asking is where do the blue wires connect? The blue wire has a plug but I cant see where it plugs into the elec center. This is the one coming from rear.

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