How to: install electronic trailer brake controller on NNBS Tahoe

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04ctd

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I started a thread "where are wires for Electric Brake controller for trailer on NNBS?"

TowGMC responded, and provided some great input:

http://www.tahoeyukonforum.com/forum/showthread.php?t=70699


watch the video in that thread, and then all these pics should be pretty clear.


I made up a little chart before I started:
tahoe end ................... Signal..................controller
white .................. ground.................. white
Blue/white .................. brake light.................. red
Red/black .................. battery power .................. black
Dark Blue .................. output to trailer .................. Blue

and i put a towel down, in case I dropped any solder

IMG_20150315_080206_648_zps3fhwyps5.jpg

there are two wires under the hood, one is for the trailer hot lead, and one is for the trailer brake controller power lead.


wire by fender:
IMG_20150315_085221_159_zpswdydjh8n.jpg

wire by brake booster:

IMG_20150315_073921_389_zps2zveph7v.jpg

IMG_20150315_085001_410_zpsijwvigly.jpg

however, the two leads have different sized holes, and will only fit on the correct terminal. Both terminals are HOT constantly, so your brake controller will stay on when the key is off (the Tekonsha P3 powers down after while)

IMG_20150315_085523_170_zpsd8qvgvt8.jpg

I had to start the flex loom on the cables in front of the fuse box, and then thread it back onto the wire, to get the flex loom to cover the wire back to where it came out of the OEM wire loom. I had to tape the flex loom every ~5 inches, because the wires were so kinked, they would poke out of the Flex Loom.

IMG_20150315_142533_519_zpsmqrp6nze.jpg

IMG_20150315_142714_918_zpsyjedoj6s.jpg

the wires under the dash are DIRECTLY above the Emergency brake pedal, and they are also uncovered, so i pushed some heat shrink back up & over all over them.


IMG_20150315_074147_312_zpsmxahomej.jpg

IMG_20150315_074124_165_zpszxv0mnpm.jpg




i put heat shrink over each wire, and i put some heat shrink over the junction to provide physical strength.

IMG_20150315_081409_038_zps09misqt0.jpg


most folks would mount the brake controller at the bottom of the dash & try to hit metal, but the lower brace is ribbed, and not flat enough to drill/thread a screw into.

IMG_20150315_082923_237_zpsokmnlt9j.jpg

IMG_20150315_083051_196_zpsuxlxuh2c.jpg

i took out the knee panel & drilled holes from behind. 10mm & 2 phillips screws


IMG_20150315_083900_448_zpsrlmm8hgr.jpg

IMG_20150315_083841_299_zps7vjwmqfs.jpg

make sure you push the trim clips back onto the knee panel prior re-assembly
IMG_20150315_083653_888_zpsputjmvep.jpg


dont forget to use a circuit breaker as recommended in the instructions, Advance Auto has these in the same section as the fuses, and I got all the flex loom from Advance, also. my local store still gives me the 10% military discount, because i buy so much stuff from there.


IMG_20150315_090103_583_zps4wpnsonp.jpg

i put a bit of heat shrink over the circuit breaker posts:

IMG_20150315_144415_409_zpsaerahowy.jpg


IMG_20150315_142341_648_zpspedkrfv4.jpg


IMG_20150315_084145_270_zps5je8yw5b.jpg

all the pictures:
http://s19.photobucket.com/user/04vrscb/library/Tahoe_trailer_brake?sort=3&page=1&postlogin=true
 
Last edited:

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