Problems installing a brake controller... Weird...

I assume the Armada red wire is connected to the black wire on the brake controller.

This is likely the problem. If the vehicle is used it may be gone. If it is new you may want to look. As suggested above there may be a tow package kit (relay, fuses, etc) that has not been installed. This (Ford version) is a bag of parts either under the passenger seat or in the glove box. It is part of the tow package.

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This may be what you are saying about No power to the red wire. A quick check would be to see if there is constant power on any of the wires coming out of the Nissan connector. That would be the one the to connect to the black wire on the controller.

According to this page I would suggest checking the voltage at the black wire going into the controller.

Without totally tearing your connections apart see if you have 12 VDC at the black wire connection.
If you dont have 12 VDC you need to trace that wire back to its source. You indicated that if you hook this to a battery directly it worked as expected.

http://hensleymfg.com/wp-content/uploads/2011/02/tru-control-manual.pdf

harper223 wrote:
I double checked, there is No power coming FROM the armada red wire. I checked this with the harness attached and without. Nissan is going to look at it on Thursday, and this better be a warranty job

Perhaps you need to install a fuse or breaker to activate the red wire? Some of the big 3 trucks require this to activate the brake controller circuit.

Hybridhunter wrote:
Sounds like you have hooked the brake trigger wire to the power in wire on the unit.

That was my thought as well.

I double checked, there is No power coming FROM the armada red wire. I checked this with the harness attached and without. Nissan is going to look at it on Thursday, and this better be a warranty job

Sounds like you have hooked the brake trigger wire to the power in wire on the unit.

enblethen wrote:
Have you checked the factory harness color code? It maybe different color code then the controller harness.
Verify Nissan and controller harness, Splice accordingly.

Also, you might try one of the Titan specific forum like titantalk.com, etc. for more info.

Have you checked the factory harness color code? It maybe different color code then the controller harness.
Verify Nissan and controller harness, Splice accordingly.

Yes, I'm using the Nissan harness.

Harper, this may sound like a dumb question, but are you using the Nissan factory pigtail that they throw in the glove box when you buy the vehicle (like Toyota does)?

What voltage is on the red wire?